added release notes for 2.13

[riysaxen-amzn]

Description

Added release notes for 2.13

Issues Resolved

[List any issues this PR will resolve]

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.76%. Comparing base (e6cd139) to head (54d5cb2).

Additional details and impacted files

@@             Coverage Diff              @@
##               2.13     #622      +/-   ##
============================================
+ Coverage     72.75%   72.76%   +0.01%     
  Complexity      864      864              
============================================
  Files           133      133              
  Lines          5850     5850              
  Branches        718      718              
============================================
+ Hits           4256     4257       +1     
  Misses         1278     1278              
+ Partials        316      315       -1     

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[engechas]

Looks like a duplicate of #623 - @riysaxen-amzn was this intended to be against main rather than 2.13?