build(deps): Bump @google-cloud/firestore in /video-worker

Bumps [@google-cloud/firestore](https://github.com/googleapis/google-cloud-node/tree/HEAD/handwritten/firestore) from 7.11.6 to 8.6.0.
- [Release notes](https://github.com/googleapis/google-cloud-node/releases)
- [Changelog](https://github.com/googleapis/google-cloud-node/blob/main/handwritten/firestore/CHANGELOG.md)
- [Commits](https://github.com/googleapis/google-cloud-node/commits/spanner-v8.6.0/handwritten/firestore)

---
updated-dependencies:
- dependency-name: "@google-cloud/firestore"
  dependency-version: 8.6.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

video-worker/package.json

@@ -13,7 +13,7 @@
     "check": "node --check src/server.mjs"
   },
   "dependencies": {
-    "@google-cloud/firestore": "^7.11.0",
+    "@google-cloud/firestore": "^8.6.0",
     "@google-cloud/storage": "^7.16.0"
   }
 }