update homepage

Author: twishabansal

.codex-plugin/plugin.json

@@ -6,7 +6,7 @@
     "name": "Google LLC",
     "email": "data-cloud-ai-integrations@google.com"
   },
-  "homepage": "https://github.com/gemini-cli-extensions/cloud-sql-postgresql",
+  "homepage": "https://cloud.google.com/sql",
   "repository": "https://github.com/gemini-cli-extensions/cloud-sql-postgresql",
   "license": "Apache-2.0",
   "keywords": [
@@ -28,4 +28,4 @@
       "You are a highly skilled database engineer and database administrator. Your purpose is to help the developer build and interact with databases and utilize data context throughout the entire software delivery cycle."
     ]
   }
-}
+}