update telegram bot (#766)

doc/cookbook/translation-bot.md

@@ -17,9 +17,9 @@ It is fine for you to use other vendors' translation, speech recognition, or OCR
 
 ## 2. How It Works
 
-The sequence chart below shows the workflow of this bot:
+The diagram below shows the workflow of this bot:
 
-![sequence chart](../imgs/translation-bot-sequence-chart.png)
+![diagram](../imgs/translation-bot-workflow.png)
 
 Upon receiving a notification of a new message from the Telegram server via webhook, the bot first checks the message type and does the following accordingly：
 
@@ -54,7 +54,7 @@ flow:
  alias: processText # alias of the filter
  namespace: extract # namespace the filter belongs to
  jumpIf: # conditional jump, begin translation
- "": translateChinese # if everything is fine, or end the
+ "": translate  # if everything is fine, or end the
  # processing otherwise.
 
 # voice message
@@ -74,7 +74,7 @@ flow:
 - filter: requestBuilderSpeechText # Save recognition result
  namespace: extract
  jumpIf: # conditional jump, begin translation
- "": translateChinese # if everything is fine, or end the
+ "": translate  # if everything is fine, or end the
  # processing otherwise.
 
 # photo message (the process is basically the same as for voice message)
@@ -96,7 +96,7 @@ flow:
 
 # translate to Chinese
 - filter: requestBuilderTranslate # Constructing the request to call the 
- alias: translateChinese # translation API
+ alias: translate  # translation API
  namespace: zh
 - filter: signAWSRequest # Signing as required by AWS
  namespace: zh
@@ -414,4 +414,4 @@ rules:
  backend: translate-pipeline' | egctl object create
 ```
 
-Now, we can test the bot in the chat. A demo video can be found at: https://www.youtube.com/watch?v=mDIAk_6ISkw。
+Now, we can test the bot in the chat. A demo video can be found at: https://www.youtube.com/watch?v=ne0OvV1FmvA.

example/translation-bot/translate-pipeline.yaml

@@ -21,7 +21,7 @@ flow:
  alias: processText # alias of the filter
  namespace: extract # namespace the filter belongs to
  jumpIf: # conditional jump, begin translation
- "": translateChinese # if everything is fine, or end the
+ "": translate  # if everything is fine, or end the
  # processing otherwise.
 
 # voice message
@@ -41,7 +41,7 @@ flow:
 - filter: requestBuilderSpeechText # Save recognition result
  namespace: extract
  jumpIf: # conditional jump, begin translation
- "": translateChinese # if everything is fine, or end the
+ "": translate  # if everything is fine, or end the
  # processing otherwise.
 
 # photo message (the process is basically the same as for voice message)
@@ -63,7 +63,7 @@ flow:
 
 # translate to Chinese
 - filter: requestBuilderTranslate # Constructing the request to call the 
- alias: translateChinese # translation API
+ alias: translate  # translation API
  namespace: zh
 - filter: signAWSRequest # Signing as required by AWS
  namespace: zh