fix golang version

[mukundansundar]

Description

Fix Golang version to 1.21.8 https://groups.google.com/g/golang-announce/c/5pwGVUPoMbg?pli=1

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR will close: #[issue number]

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 22.55%. Comparing base (619cd9c) to head (8143a9c).

Additional details and impacted files

@@              Coverage Diff              @@
##           release-1.13    #1389   +/-   ##
=============================================
  Coverage         22.55%   22.55%           
=============================================
  Files                40       40           
  Lines              4758     4758           
=============================================
  Hits               1073     1073           
  Misses             3607     3607           
  Partials             78       78           

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