docs: update the issue config the greeting action;

.github/ISSUE_TEMPLATE/config.yml

@@ -1,6 +1,10 @@
 blank_issues_enabled: true
 version: 2.1
 contact_links:
- - name: PyPOTS Community on Slack
+ - name: 🤗 PyPOTS Community on Slack
  url: https://join.slack.com/t/pypots-org/shared_invite/zt-1gq6ufwsi-p0OZdW~e9UW_IA4_f1OfxA
  about: General usage questions, community discussions, and the development team are here.
+
+ - name: 🇨🇳 PyPOTS微信社区 (Community on WeChat)
+ url: https://mp.weixin.qq.com/s/CGkirx7ODkngk6tGGANksw
+ about: 中文社区讨论群，欢迎加入！

.github/workflows/greetings.yml

@@ -22,11 +22,10 @@ jobs:
  issue-message: |
  Hi there 👋,
 
- Thank you so much for your attention to PyPOTS! You can follow me on GitHub to receive the latest news of PyPOTS.
- If you find PyPOTS helpful to your work, please star⭐️ this repository.
+ Thank you so much for your attention to PyPOTS! You can [follow me](https://github.com/WenjieDu) on GitHub 
+ to receive the latest news of PyPOTS. If you find PyPOTS helpful to your work, please star⭐️ this repository.
  Your star is your recognition, which can help more people notice PyPOTS and grow PyPOTS community.
  It matters and is definitely a kind of contribution to the community.
- You can also [follow me](https://github.com/WenjieDu) on GitHub to receive the latest news of PyPOTS.
 
  I have received your message and will respond ASAP. Thank you for your patience! 😃