Build(deps): bump firebase from 9.14.0 to 9.15.0

Bumps [firebase](https://github.com/firebase/firebase-js-sdk) from 9.14.0 to 9.15.0.
- [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/firebase@9.14.0...firebase@9.15.0)

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

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