fix: packages/owl-bot/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-MARKDOWNIT-6483324

packages/owl-bot/package.json

@@ -68,14 +68,14 @@
   "dependencies": {
     "@google-automations/datastore-lock": "^4.0.1",
     "@google-automations/label-utils": "^3.0.0",
-    "@google-cloud/cloudbuild": "^3.1.1",
+    "@google-cloud/cloudbuild": "^4.0.0",
     "@octokit/rest": "^19.0.4",
     "@octokit/types": "^8.0.0",
     "@octokit/webhooks-types": "^6.3.6",
     "adm-zip": "^0.5.9",
     "ajv": "^8.11.0",
     "code-suggester": "^4.1.0",
-    "firebase-admin": "^11.0.1",
+    "firebase-admin": "^12.0.0",
     "follow-redirects": "^1.15.2",
     "fs-extra": "^11.0.0",
     "gaxios": "^5.0.1",