update go version format

[vepatel]

Proposed changes

• update go version format to 1.n.p as required from v1.21.x, fixes: https://github.com/nginxinc/kubernetes-ingress/security/code-scanning/tools/CodeQL/status/configurations/actions-FZTWS5DIOVRC653POJVWM3DPO5ZS6Y3PMRSXC3BNMFXGC3DZONUXGLTZNVWA/835e1f342fbbf61f15fb428340fa748f2f156c8b9301a6849a1288790460b029

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.01%. Comparing base (ccd88fd) to head (7d285ed).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6350   +/-   ##
=======================================
  Coverage   53.01%   53.01%           
=======================================
  Files          79       80    +1     
  Lines       15921    15921           
=======================================
  Hits         8441     8441           
  Misses       7073     7073           
  Partials      407      407           

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