Opt into dependabot GitHub actions version updates

[ddelnano]

Summary: Opt into dependabot GitHub actions version updates

Earlier today, the download/upload artifacts actions were deprecated and started failing builds (#2079). There are other actions will be deprecated soon, so let's opt into dependabots updates to stay ahead of these notices.

Your workflow is using a version of actions/cache that is scheduled for deprecation, actions/cache@88522ab. Please update your workflow to use either v3 or v4 of actions/cache to avoid interruptions. Learn more: https://github.blog/changelog/2024-12-05-notice-of-upcoming-releases-and-breaking-changes-for-github-actions/#actions-cache-v1-v2-and-actions-toolkit-cache-package-closing-down

There are other alternatives (like Renovatebot). I went for this since it's already in place to get coverage quickly, but open to exploring other options in the future.

Relevant Issues: N/A

Type of change: /kind cleanup

Test Plan: Read the docs on the setting changed