migrate to github/actions @v4

[hemnstill]

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[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ BASH	bash-exec	42		0	0.12s
✅ BASH	shfmt	42	2	0	0.1s
✅ EDITORCONFIG	editorconfig-checker	125		0	0.27s
✅ PYTHON	ruff	7	0	0	0.11s
✅ YAML	yamllint	4		0	0.33s

See detailed report in MegaLinter reports

You could have the same capabilities but better runtime performances if you use a MegaLinter flavor:

• oxsecurity/megalinter/flavors/python@v8.4.2 (62 linters)
• oxsecurity/megalinter/flavors/cupcake@v8.4.2 (85 linters)