Got KeyError: 0 for Gelbooru Collection

[Misaka13514]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Send a gelbooru collection link
2. See error KeyError: 0

links tested (NSFW)

• https://gelbooru.com/index.php?page=post&s=view&id=6707612
• https://gelbooru.com/index.php?page=post&s=view&id=6322852

Expected behavior
collect the collection or show a clear error message

Error output / Logs
Logs are usually critical to identify the cause of a bug, please paste the complete log from start to end.
Make sure to remove or mask all secrets, such as bot token and personal information!

2022-03-07T11:58:39.707878+00:00 heroku[router]: at=info method=POST path="/SOME_BOT_TOKEN" host=misakah.herokuapp.com request_id=4f0ebd2e-e88c-45f5-8184-7495b85ab2ee fwd="91.108.6.78" dyno=web.1 connect=1ms service=9ms status=200 bytes=171 protocol=https
2022-03-07T11:58:39.700272+00:00 app[web.1]: 2022-03-07 11:58:39,700 - nazurin - INFO - Collection update: site=Gelbooru, match=('6707612',)
2022-03-07T11:58:39.708133+00:00 app[web.1]: 2022-03-07 11:58:39,707 - aiohttp.access - INFO - 10.1.23.249 [07/Mar/2022:11:58:39 +0000] "POST /SOME_BOT_TOKEN HTTP/1.1" 200 171 "-" "-"
2022-03-07T11:58:39.825972+00:00 app[web.1]: 2022-03-07 11:58:39,825 - nazurin - ERROR - Update {"update_id": 90486771, "message": {"message_id": 1505, "from": {"id": 673435039, "is_bot": false, "first_name": "欠陥電気", "last_name": "𝑹𝒂𝒅𝒊𝒐𝑵𝒐𝒊𝒔𝒆", "username": "Misaka_0x34ca", "language_code": "ja"}, "chat": {"id": 673435039, "first_name": "欠陥電気", "last_name": "𝑹𝒂𝒅𝒊𝒐𝑵𝒐𝒊𝒔𝒆", "username": "Misaka_0x34ca", "type": "private"}, "date": 1646654319, "text": "https://gelbooru.com/index.php?page=post&s=view&id=6707612", "entities": [{"type": "url", "offset": 0, "length": 58}]}} caused <class 'KeyError'>: 0
2022-03-07T11:58:39.826994+00:00 app[web.1]: Traceback (most recent call last):
2022-03-07T11:58:39.827084+00:00 app[web.1]:   File "/app/nazurin/__main__.py", line 54, in on_error
2022-03-07T11:58:39.827085+00:00 app[web.1]:     raise exception
2022-03-07T11:58:39.827125+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.8/site-packages/aiogram/dispatcher/dispatcher.py", line 1394, in process_response
2022-03-07T11:58:39.827125+00:00 app[web.1]:     response = task.result()
2022-03-07T11:58:39.827142+00:00 app[web.1]:   File "/app/nazurin/dispatcher.py", line 59, in update_collection
2022-03-07T11:58:39.827142+00:00 app[web.1]:     await self.bot.updateCollection(urls, message)
2022-03-07T11:58:39.827167+00:00 app[web.1]:   File "/app/nazurin/bot.py", line 112, in updateCollection
2022-03-07T11:58:39.827168+00:00 app[web.1]:     illust = await self.sites.handle_update(result)
2022-03-07T11:58:39.827189+00:00 app[web.1]:   File "/app/nazurin/sites/__init__.py", line 66, in handle_update
2022-03-07T11:58:39.827189+00:00 app[web.1]:     return await handle(result['match'])
2022-03-07T11:58:39.827205+00:00 app[web.1]:   File "/app/nazurin/sites/Gelbooru/interface.py", line 19, in handle
2022-03-07T11:58:39.827205+00:00 app[web.1]:     illust = await Gelbooru().fetch(post_id)
2022-03-07T11:58:39.827221+00:00 app[web.1]:   File "/app/nazurin/sites/Gelbooru/api.py", line 22, in fetch
2022-03-07T11:58:39.827222+00:00 app[web.1]:     post = await self.getPost(post_id)
2022-03-07T11:58:39.827237+00:00 app[web.1]:   File "/app/nazurin/sites/Gelbooru/api.py", line 18, in getPost
2022-03-07T11:58:39.827248+00:00 app[web.1]:     post = response[0]
2022-03-07T11:58:39.827282+00:00 app[web.1]: KeyError: 0
2022-03-07T11:59:10.277016+00:00 heroku[router]: at=info method=POST path="/SOME_BOT_TOKEN" host=misakah.herokuapp.com request_id=c292ca3d-18bc-4d71-9ad6-a1cb8fe88559 fwd="91.108.6.78" dyno=web.1 connect=0ms service=13ms status=200 bytes=171 protocol=https
2022-03-07T11:59:10.266812+00:00 app[web.1]: 2022-03-07 11:59:10,266 - nazurin - INFO - Collection update: site=Gelbooru, match=('6322852',)
2022-03-07T11:59:10.277338+00:00 app[web.1]: 2022-03-07 11:59:10,277 - aiohttp.access - INFO - 10.1.23.249 [07/Mar/2022:11:59:10 +0000] "POST /SOME_BOT_TOKEN HTTP/1.1" 200 171 "-" "-"
2022-03-07T11:59:10.406410+00:00 app[web.1]: 2022-03-07 11:59:10,406 - nazurin - ERROR - Update {"update_id": 90486772, "message": {"message_id": 1507, "from": {"id": 673435039, "is_bot": false, "first_name": "欠陥電気", "last_name": "𝑹𝒂𝒅𝒊𝒐𝑵𝒐𝒊𝒔𝒆", "username": "Misaka_0x34ca", "language_code": "ja"}, "chat": {"id": 673435039, "first_name": "欠陥電気", "last_name": "𝑹𝒂𝒅𝒊𝒐𝑵𝒐𝒊𝒔𝒆", "username": "Misaka_0x34ca", "type": "private"}, "date": 1646654350, "text": "https://gelbooru.com/index.php?page=post&s=view&id=6322852", "entities": [{"type": "url", "offset": 0, "length": 58}]}} caused <class 'KeyError'>: 0
2022-03-07T11:59:10.406540+00:00 app[web.1]: Traceback (most recent call last):
2022-03-07T11:59:10.406573+00:00 app[web.1]:   File "/app/nazurin/__main__.py", line 54, in on_error
2022-03-07T11:59:10.406573+00:00 app[web.1]:     raise exception
2022-03-07T11:59:10.406576+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.8/site-packages/aiogram/dispatcher/dispatcher.py", line 1394, in process_response
2022-03-07T11:59:10.406576+00:00 app[web.1]:     response = task.result()
2022-03-07T11:59:10.406586+00:00 app[web.1]:   File "/app/nazurin/dispatcher.py", line 59, in update_collection
2022-03-07T11:59:10.406586+00:00 app[web.1]:     await self.bot.updateCollection(urls, message)
2022-03-07T11:59:10.406594+00:00 app[web.1]:   File "/app/nazurin/bot.py", line 112, in updateCollection
2022-03-07T11:59:10.406594+00:00 app[web.1]:     illust = await self.sites.handle_update(result)
2022-03-07T11:59:10.406602+00:00 app[web.1]:   File "/app/nazurin/sites/__init__.py", line 66, in handle_update
2022-03-07T11:59:10.406603+00:00 app[web.1]:     return await handle(result['match'])
2022-03-07T11:59:10.406610+00:00 app[web.1]:   File "/app/nazurin/sites/Gelbooru/interface.py", line 19, in handle
2022-03-07T11:59:10.406611+00:00 app[web.1]:     illust = await Gelbooru().fetch(post_id)
2022-03-07T11:59:10.406619+00:00 app[web.1]:   File "/app/nazurin/sites/Gelbooru/api.py", line 22, in fetch
2022-03-07T11:59:10.406619+00:00 app[web.1]:     post = await self.getPost(post_id)
2022-03-07T11:59:10.406627+00:00 app[web.1]:   File "/app/nazurin/sites/Gelbooru/api.py", line 18, in getPost
2022-03-07T11:59:10.406628+00:00 app[web.1]:     post = response[0]
2022-03-07T11:59:10.406644+00:00 app[web.1]: KeyError: 0

Environment (please complete the following information):

• latest version deployed on heroku

Additional context
This function was working fine before.
The link opens fine manually. (even works while using Heroku's IP)

[y-young]

It seems Gelbooru changed their API response format recently.
Thanks for reporting!