chore: github actions cleanup

[jmeridth]

Pull Request

Proposed Changes

• switch to umutable actions on ones that allow it (closes 9 security warnings)

Readiness Checklist

Author/Contributor

• If documentation is needed for this change, has that been included in this pull request
• run make lint and fix any issues that you have introduced
• run make test and ensure you have test coverage for the lines you are introducing
• If publishing new data to the public (scorecards, security scan results, code quality results, live dashboards, etc.), please request review from @jeffrey-luszcz

Reviewer

• Label as either fix, documentation, enhancement, infrastructure, maintenance or breaking

[zkoppert]

Thanks JM! 🎉