Update CHANGELOG 3.6.0

[rsareddy0329]

Issue #, if available:

Description of changes:

• V3 Release change log PR

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.18%. Comparing base (22dea35) to head (460b899).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5649      +/-   ##
==========================================
- Coverage   93.18%   93.18%   -0.01%     
==========================================
  Files         401      401              
  Lines       56289    56301      +12     
==========================================
+ Hits        52453    52464      +11     
- Misses       3836     3837       +1     

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