Update gcloud versions (#301)

Update latest gcloud versions

Author: google-github-actions-bot

data/versions.json

@@ -458,5 +458,6 @@
   "504.0.0",
   "504.0.1",
   "505.0.0",
-  "506.0.0"
+  "506.0.0",
+  "507.0.0"
 ]