Bump undici and firebase in /firebase/functions

Bumps [undici](https://github.com/nodejs/undici) to 5.28.4 and updates ancestor dependency [firebase](https://github.com/firebase/firebase-js-sdk). These dependencies need to be updated together.


Updates `undici` from 5.28.3 to 5.28.4
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v5.28.3...v5.28.4)

Updates `firebase` from 10.8.1 to 10.11.0
- [Release notes](https://github.com/firebase/firebase-js-sdk/releases)
- [Changelog](https://github.com/firebase/firebase-js-sdk/blob/master/CHANGELOG.md)
- [Commits](https://github.com/firebase/firebase-js-sdk/compare/[email protected]@10.11.0)

---
updated-dependencies:
- dependency-name: undici
  dependency-type: indirect
- dependency-name: firebase
  dependency-type: direct:development
...

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