Bump protobufjs-cli and firebase-admin in /functions

Removes [protobufjs-cli](https://github.com/protobufjs/protobuf.js). It's no longer used after updating ancestor dependency [firebase-admin](https://github.com/firebase/firebase-admin-node). These dependencies need to be updated together.


Removes `protobufjs-cli`

Updates `firebase-admin` from 11.11.1 to 13.9.0
- [Release notes](https://github.com/firebase/firebase-admin-node/releases)
- [Changelog](https://github.com/firebase/firebase-admin-node/blob/main/CHANGELOG.md)
- [Commits](firebase/firebase-admin-node@v11.11.1...v13.9.0)

---
updated-dependencies:
- dependency-name: protobufjs-cli
  dependency-version: 
  dependency-type: indirect
- dependency-name: firebase-admin
  dependency-version: 13.9.0
  dependency-type: direct:production
...

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Author: dependabot[bot]