fix: Only collect .yml or .yaml files as workflow much earlier

[ChristopherHX]

GitHub Actions doesn't process non yaml files, since strict validation this doesn't make sense.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ EDITORCONFIG	editorconfig-checker	1		0	0.01s
✅ REPOSITORY	gitleaks	yes		no	2.39s
✅ REPOSITORY	git_diff	yes		no	0.01s
✅ REPOSITORY	grype	yes		no	8.95s
✅ REPOSITORY	secretlint	yes		no	1.09s
✅ REPOSITORY	trivy-sbom	yes		no	0.12s
✅ REPOSITORY	trufflehog	yes		no	3.3s

See detailed report in MegaLinter reports
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.01%. Comparing base (5a80a04) to head (9942f74).
Report is 128 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #2523       +/-   ##
===========================================
+ Coverage   61.56%   75.01%   +13.45%     
===========================================
  Files          53       62        +9     
  Lines        9002    10014     +1012     
===========================================
+ Hits         5542     7512     +1970     
+ Misses       3020     1936     -1084     
- Partials      440      566      +126     

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[ChristopherHX]

TLDR, seems like non yml files are discarded later...