fix(renovate): fix config validation error (#413)

Author: SaxenaAnushka102

.github/renovate.json5

@@ -32,7 +32,6 @@
       ],
       branchName: 'auto-update/toolbox-server-v{{newValue}}',
       commitMessageTopic: 'chore(deps): update MCP Toolbox server for integration tests to {{newValue}}',
-      groupName: false,
       matchUpdateTypes: [
         'minor',
         'patch',
@@ -87,4 +86,4 @@
       packageNameTemplate: 'googleapis/genai-toolbox',
     },
   ],
-}
+}