Fix: add the token field to action.yaml

[knanao]

No description provided.

[github-actions]

Ran preview-cloudrun against head commit 3ddc07d of this pull request. preview-cloudrun generated a new temporary Cloud Run revision with 0% traffic.

service: helloworld, region: us-central1

Revision URL: https://pr-3---helloworld-hpswpvfxqq-uc.a.run.app

If this service requires authentication, please refer to this.

curl -s GET \
  https://pr-3---helloworld-hpswpvfxqq-uc.a.run.app \
  -H "Authorization: Bearer $(gcloud auth print-identity-token)"