GitHub actions template linting fixes

[mihaur]

Fixes #
Added fixes for:

• Checkov CKV2_GHA_1 false positive
• redirects reported by LYCHEE that were fixed made it back to the template

Proposed Changes

Readiness Checklist

Author/Contributor

• Add entry to the CHANGELOG listing the change and linking to the corresponding issue (if appropriate)
• If documentation is needed for this change, has that been included in this pull request

Reviewing Maintainer

• Label as breaking if this is a large fundamental change
• Label as either automation, bug, documentation, enhancement, infrastructure, or performance

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[nvuillam]

@mihaur thanks :)

I agree with all the fixes, except the use of hashes for GitHub actions, not everyone has dependabot / renovate, so I prefer them to target the tag

[mihaur]

@nvuillam will update the PR to use versions in GitHub actions.