Summary of the new feature / enhancement

This repository already uses Dependabot but not for GitHub Actions used in workflows. I suggest enabling it to keep Actions updated.

I see some old (major) versions used in various workflows, with CodeQL v1 being probably the most important one because it will be deprecated in December.
https://github.blog/changelog/2022-04-27-code-scanning-deprecation-of-codeql-action-v1/

Proposed technical implementation details (optional)

Adding it is pretty simple, just append dependabot.yml:

  - package-ecosystem: "github-actions"
    directory: "/"
    schedule:
      interval: "daily"