chore(dependabot): Include GitHub Actions in Dependabot config

[Mrtenz]

Explanation

This adds actions/* and MetaMask/* to the Dependabot config, ensuring we keep these actions up to date as well. I've limited it to these two, since we do use some other actions which are usually pinned to a specific hash, and require explicit approval to be used first.

References

MetaMask/metamask-module-template#274

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed, highlighting breaking changes as necessary
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes

---

Note

Adds Dependabot config for GitHub Actions with daily 06:00 runs on main, allowing MetaMask/* and actions/*, and capping open PRs at 10.

• Dependabot configuration:
  • GitHub Actions updates: Add package-ecosystem: github-actions with daily schedule at 06:00, targeting main.
    • Allow only MetaMask/* and actions/*.
    • Set open-pull-requests-limit to 10.

^{Written by Cursor Bugbot for commit 92188fd. This will update automatically on new commits. Configure here.}

[Mrtenz]

This link is broken.

[cryptodev-2s]

LGTM!