Bump firebase-tools from 12.2.1 to 12.4.6

Bumps [firebase-tools](https://github.com/firebase/firebase-tools) from 12.2.1 to 12.4.6.
- [Release notes](https://github.com/firebase/firebase-tools/releases)
- [Changelog](https://github.com/firebase/firebase-tools/blob/master/CHANGELOG.md)
- [Commits](firebase/firebase-tools@v12.2.1...v12.4.6)

---
updated-dependencies:
- dependency-name: firebase-tools
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>