chore(deps): update dependency @google-cloud/storage to v6 (#614)

Author: renovate-bot

automl/package.json

@@ -22,7 +22,7 @@
     "yargs": "^16.0.0"
   },
   "devDependencies": {
-    "@google-cloud/storage": "^5.0.0",
+    "@google-cloud/storage": "^6.0.0",
     "chai": "^4.2.0",
     "mocha": "^8.0.0",
     "uuid": "^8.0.0"