| The following is not yet available as part of Dependabots package ecosystem. https://github.community/t/dependabot-with-reusable-workflow-versions/207372/4  | 
Since Dependabot has native GitHub Actions support, to enable it on your GitHub repo all you need to do is add the .github/dependabot.yml file:
version: 2
updates:
  # Maintain dependencies for GitHub Actions
  - package-ecosystem: "github-actions"
    directory: "/"
    schedule:
      interval: "daily"