docs:update PULL_REQUEST_TEMPLATE.md

[fuyuwei01]

PR Type

Describe what this PR does for and how you did.

Adding the issue link (#xxx) if possible.

Note

Checklist

• Add information of this PR to CHANGELOG.md in root of project.
• Add documentation in javadoc or comment below the PR if necessary.

Checklist (Optional)

• Will pull request to branch of 2023.
• Will pull request to branch of 2022.
• Will pull request to branch of 2021.
• Will pull request to branch of 2020.
• Will pull request to branch of hoxton.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.68%. Comparing base (64cc79b) to head (ede5a6d).
Report is 1 commits behind head on 2021.

Additional details and impacted files

@@             Coverage Diff              @@
##               2021    #1384      +/-   ##
============================================
+ Coverage     64.66%   64.68%   +0.02%     
  Complexity        2        2              
============================================
  Files           322      322              
  Lines          7522     7519       -3     
  Branches        911      911              
============================================
  Hits           4864     4864              
+ Misses         2246     2243       -3     
  Partials        412      412              

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