Bump the npm_and_yarn group in /backend/typescript with 2 updates

Bumps the npm_and_yarn group in /backend/typescript with 2 updates: [firebase-admin](https://github.com/firebase/firebase-admin-node) and [@google-cloud/firestore](https://github.com/googleapis/nodejs-firestore).


Updates `firebase-admin` from 9.12.0 to 12.0.0
- [Release notes](https://github.com/firebase/firebase-admin-node/releases)
- [Commits](firebase/firebase-admin-node@v9.12.0...v12.0.0)

Updates `@google-cloud/firestore` from 4.15.1 to 7.6.0
- [Release notes](https://github.com/googleapis/nodejs-firestore/releases)
- [Changelog](https://github.com/googleapis/nodejs-firestore/blob/main/CHANGELOG.md)
- [Commits](googleapis/nodejs-firestore@v4.15.1...v7.6.0)

---
updated-dependencies:
- dependency-name: firebase-admin
  dependency-type: direct:production
  dependency-group: npm_and_yarn-security-group
- dependency-name: "@google-cloud/firestore"
  dependency-type: indirect
  dependency-group: npm_and_yarn-security-group
...

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