Fix helm linter in CI

[bjee19]

Issue with yamale inside helm chart tester. This pins the yamale version to the fixed version.

Issue and solution shown: helm/chart-testing-action#177

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.70%. Comparing base (f47862e) to head (510bb68).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4080   +/-   ##
=======================================
  Coverage   86.69%   86.70%           
=======================================
  Files         128      128           
  Lines       16758    16758           
  Branches       62       62           
=======================================
+ Hits        14529    14530    +1     
+ Misses       2044     2043    -1     
  Partials      185      185           

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