chore(deps): bump @google-cloud/pubsub from 4.7.2 to 4.8.0

Bumps [@google-cloud/pubsub](https://github.com/googleapis/nodejs-pubsub) from 4.7.2 to 4.8.0.
- [Release notes](https://github.com/googleapis/nodejs-pubsub/releases)
- [Changelog](https://github.com/googleapis/nodejs-pubsub/blob/main/CHANGELOG.md)
- [Commits](googleapis/nodejs-pubsub@v4.7.2...v4.8.0)

---
updated-dependencies:
- dependency-name: "@google-cloud/pubsub"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -71,7 +71,7 @@
     "@fluent/langneg": "^0.7.0",
     "@fluent/react": "^0.15.2",
     "@google-cloud/logging-winston": "^6.0.0",
-    "@google-cloud/pubsub": "^4.7.2",
+    "@google-cloud/pubsub": "^4.8.0",
     "@grpc/grpc-js": "1.11.3",
     "@leeoniya/ufuzzy": "^1.0.14",
     "@mozilla/glean": "^5.0.3",