fix curl example

Remove unnecessary `,` from curl example

docs/my-website/docs/proxy/quick_start.md

@@ -58,7 +58,7 @@ curl --location 'http://0.0.0.0:8000/chat/completions' \
           "role": "user",
           "content": "what llm are you"
         }
-      ],
+      ]
     }
 '
 ```
@@ -604,4 +604,4 @@ curl -X POST \
 https://api.openai.com/v1/chat/completions \
 -H 'content-type: application/json' -H 'Authorization: Bearer sk-qnWGUIW9****************************************' \
 -d '{"model": "gpt-3.5-turbo", "messages": [{"role": "user", "content": "this is a test request, write a short poem"}]}'
-```
+```