fix(deps): update dependency @google-cloud/bigquery to v6 (#365)

Author: renovate-bot

datacatalog/snippets/package.json

@@ -15,7 +15,7 @@
     "test": "mocha --timeout 600000"
   },
   "dependencies": {
-    "@google-cloud/bigquery": "^5.5.0",
+    "@google-cloud/bigquery": "^6.0.0",
     "@google-cloud/datacatalog": "^2.5.0",
     "uuid": "^8.3.1"
   },