firebase-tools: Unable to find a valid endpoint for function mail

[REQUIRED] Environment info

firebase-tools: 11.4.0

Platform: macOS and Github Actions

[REQUIRED] Test case

[REQUIRED] Steps to reproduce

firebase deploy --only hosting:sometarget or

      - uses: FirebaseExtended/action-hosting-deploy@v0
        with:
          repoToken: '${{ secrets.GITHUB_TOKEN }}'
          firebaseServiceAccount: '${{ secrets.FIREBASE_SERVICE_ACCOUNT_DEV }}'
          projectId: xxxxxx
          channelID: live
          target: ${{ env.TARGET }}
        env:
          FIREBASE_CLI_PREVIEWS: hostingchannels

[REQUIRED] Expected behavior

Should deploy successfully, because last deployment succeeded on 17 Jun without code changes.

***
  details_url: 'https://xxx.web.app/',
  conclusion: 'success',
  output: ***
    title: 'Production deploy succeeded',
    summary: '[xxx.web.app](https://xxx.web.app/)'
  ***
***

[REQUIRED] Actual behavior

Deployment fails with the following error message:

  ***
    "status": "error",
    "error": "Unable to find a valid endpoint for function mail"
  ***
```
<!-- Run the command with --debug flag, and include the logs below. -->