[GitHub] [pulsar] codelipenghui opened a new pull request #4315: [doc] Update acknowledgement and dead letter topic documentation.

[GitBox <gi...@apache.org>]

codelipenghui opened a new pull request #4315: [doc] Update acknowledgement and dead letter topic documentation.
URL: https://github.com/apache/pulsar/pull/4315
 
 
   Fixes #4119
   
   ### Motivation
   
   Catch up documentation of dead letter topic.
   
   ### Does this pull request potentially affect one of the following parts:
   
   *If `yes` was chosen, please highlight the changes*
   
     - Dependencies (does it add or upgrade a dependency): (no)
     - The public API: (yes)
     - The schema: (no)
     - The default values of configurations: (no)
     - The wire protocol: (no)
     - The rest endpoints: (no)
     - The admin cli options: (no)
     - Anything that affects deployment: (no)
   
   ### Documentation
   
     - Does this pull request introduce a new feature? (no)
   

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