chore(deps): bump firebase-admin from 9.3.0 to 9.4.0

Bumps [firebase-admin](https://github.com/firebase/firebase-admin-node) from 9.3.0 to 9.4.0.
- [Release notes](https://github.com/firebase/firebase-admin-node/releases)
- [Commits](firebase/firebase-admin-node@v9.3.0...v9.4.0)

Signed-off-by: dependabot[bot] <support@github.com>