docs: cherry-pick 6.4.3 changelog

[qinzhouxu]

cherry-pick #15164

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.24%. Comparing base (08ea48c) to head (bb19dac).

Additional details and impacted files

@@           Coverage Diff            @@
##              dev   #15165    +/-   ##
========================================
  Coverage   89.24%   89.24%            
========================================
  Files         618      618            
  Lines       37993    37993            
  Branches     7689     7550   -139     
========================================
  Hits        33905    33905            
  Misses       1972     1972            
  Partials     2116     2116            

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