Update config-template.json

config-template.json

@@ -2,7 +2,7 @@
   "open_ai_api_key": "YOUR API KEY",
   "model": "gpt-3.5-turbo",
   "channel_type": "wx",
-  "proxy": ",
+  "proxy": "",
   "hot_reload": false,
   "model": "claude",
   "channel_type": "wx",