Update testing.yml to fix gh action versions

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Errors	Elapsed time
✅ ACTION	actionlint	2	0	0.02s
✅ BASH	bash-exec	5	0	0.02s
✅ BASH	shellcheck	5	0	0.1s
⚠️ BASH	shfmt	5	4	0.01s
⚠️ COPYPASTE	jscpd	yes	2	1.55s
✅ DOCKERFILE	hadolint	1	0	0.08s
✅ JSON	jsonlint	2	0	0.19s
⚠️ JSON	prettier	2	1	0.57s
✅ JSON	v8r	2	0	2.2s
⚠️ MARKDOWN	markdownlint	22	203	0.81s
⚠️ MARKDOWN	markdown-link-check	22	1	12.49s
⚠️ MARKDOWN	markdown-table-formatter	22	1	0.27s
⚠️ PYTHON	bandit	3	8	0.93s
⚠️ PYTHON	black	3	1	1.15s
✅ PYTHON	flake8	3	0	0.49s
⚠️ PYTHON	isort	3	1	0.23s
✅ PYTHON	mypy	3	0	7.89s
✅ PYTHON	ruff	3	0	0.01s
⚠️ REPOSITORY	checkov	yes	14	17.32s
⚠️ REPOSITORY	devskim	yes	25	2.07s
✅ REPOSITORY	dustilock	yes	no	0.01s
✅ REPOSITORY	gitleaks	yes	no	0.21s
✅ REPOSITORY	git_diff	yes	no	0.01s
✅ REPOSITORY	grype	yes	no	16.37s
✅ REPOSITORY	secretlint	yes	no	1.22s
✅ REPOSITORY	syft	yes	no	0.37s
⚠️ REPOSITORY	trivy	yes	1	14.44s
✅ REPOSITORY	trivy-sbom	yes	no	13.62s
✅ REPOSITORY	trufflehog	yes	no	3.15s
⚠️ SPELL	cspell	166	780	23.67s
⚠️ SPELL	lychee	122	24	47.57s
✅ TERRAFORM	terraform-fmt	6	0	0.25s
⚠️ TERRAFORM	terrascan	yes	1	11.08s
✅ XML	xmllint	6	0	0.01s
⚠️ YAML	prettier	98	1	2.76s
✅ YAML	v8r	98	0	51.76s
✅ YAML	yamllint	98	0	1.15s

See detailed report in MegaLinter reports

You could have same capabilities but better runtime performances if you request a new MegaLinter flavor.

_MegaLinter is graciously provided by _