Update gcloud versions (#368)

Update latest gcloud versions

Author: google-github-actions-bot

data/versions.json

@@ -502,5 +502,6 @@
   "544.0.0",
   "545.0.0",
   "546.0.0",
-  "547.0.0"
+  "547.0.0",
+  "548.0.0"
 ]