Track 1.3.20 in release inputs

[bshien]

Description

Track 1.3.20 in release inputs

Issues Resolved

Part of opensearch-project/opensearch-build#4990

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.87%. Comparing base (7d0c969) to head (2e831c4).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #114   +/-   ##
=========================================
  Coverage     86.87%   86.87%           
  Complexity      318      318           
=========================================
  Files            69       69           
  Lines          1767     1768    +1     
  Branches         80       80           
=========================================
+ Hits           1535     1536    +1     
  Misses          195      195           
  Partials         37       37           

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