Update branch name from master to main in CI workflow

[MohamedSabthar]

Purpose

$Subject

Examples

Checklist

• Linked to an issue
• Updated the changelog
• Added tests
• Updated the spec
• Checked native-image compatibility

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (145cfa4) 78.15% compared to head (383de60) 78.15%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #22   +/-   ##
=======================================
  Coverage   78.15%   78.15%           
=======================================
  Files          12       12           
  Lines         586      586           
  Branches      373      373           
=======================================
  Hits          458      458           
  Misses        128      128           

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