build(deps): bump google.com/cloudsdktool/google-cloud-cli (#1121)

Bumps google.com/cloudsdktool/google-cloud-cli from 463.0.0-emulators to 501.0.0-emulators.

---
updated-dependencies:
- dependency-name: google.com/cloudsdktool/google-cloud-cli
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docker/images/pubsub-emulator/Dockerfile

@@ -1,3 +1,3 @@
 # Define this image outside of docker-compose.yml so that it gets dependabot updates
-FROM gcr.io/google.com/cloudsdktool/google-cloud-cli:463.0.0-emulators@sha256:4a3ef96d0379a5bf94285e743902a4d7da7f191aac6a542464e096bc72585eaa
+FROM gcr.io/google.com/cloudsdktool/google-cloud-cli:501.0.0-emulators@sha256:4dfc65b1795329f1a94316d3a0eb70a4a37d4813cac0efe05c43b08b2e66d44d
 # also available as google/cloud-sdk:<version>-emulators