[chore] Release 4.22.0

[lahirumaramba]

New Features

• feat(fcm): Migrate topic management to FCM v1 API (feat(fcm): Migrate topic management to FCM v1 API #785)

Miscellaneous

• chore: Use GitHub App and fast-forward merge for releases (chore: Use GitHub App and fast-forward merge for releases #784)
• chore: remove unwanted tag_release.yml and restore release.yml (chore: remove unwanted tag_release.yml and restore release.yml #783)
• chore: Merge master into dev to sync history
• chore: replace ioutil.ReadFile with os.ReadFile (chore: replace ioutil.ReadFile with os.ReadFile #718)
• chore(deps): bump grpc and x/text versions (chore(deps): bump grpc and x/text dependencies #776)
• chore: update GitHub Actions to Node 24 versions (chore: update GitHub Actions to Node 24 versions #775)

[gemini-code-assist]

Code Review

This pull request updates the version of the Firebase Go Admin SDK from 4.21.0 to 4.22.0 in firebase.go. There are no review comments, and I have no feedback to provide.

[jonathanedey]

LGTM, Thanks!