nitpick: fix small typos in template.en.mdx (#13156)

web/app/components/develop/template/template.en.mdx

       data: {"event": "message", "message_id": "5ad4cb98-f0c7-4085-b384-88c403be6290", "answer": "'m", "created_at": 1679586595}
       data: {"event": "message", "message_id": "5ad4cb98-f0c7-4085-b384-88c403be6290", "answer": " glad", "created_at": 1679586595}
       data: {"event": "message", "message_id": "5ad4cb98-f0c7-4085-b384-88c403be6290", "answer": " to", "created_at": 1679586595}
-      data: {"event": "message", "message_id": : "5ad4cb98-f0c7-4085-b384-88c403be6290", "answer": " meet", "created_at": 1679586595}
-      data: {"event": "message", "message_id": : "5ad4cb98-f0c7-4085-b384-88c403be6290", "answer": " you", "created_at": 1679586595}
+      data: {"event": "message", "message_id": "5ad4cb98-f0c7-4085-b384-88c403be6290", "answer": " meet", "created_at": 1679586595}
+      data: {"event": "message", "message_id": "5ad4cb98-f0c7-4085-b384-88c403be6290", "answer": " you", "created_at": 1679586595}
       data: {"event": "message_end", "id": "5e52ce04-874b-4d27-9045-b3bc80def685", "metadata": {"usage": {"prompt_tokens": 1033, "prompt_unit_price": "0.001", "prompt_price_unit": "0.001", "prompt_price": "0.0010330", "completion_tokens": 135, "completion_unit_price": "0.002", "completion_price_unit": "0.001", "completion_price": "0.0002700", "total_tokens": 1168, "total_price": "0.0013030", "currency": "USD", "latency": 1.381760165997548}}}
       data: {"event": "tts_message", "conversation_id": "23dd85f3-1a41-4ea0-b7a9-062734ccfaf9", "message_id": "a8bdc41c-13b2-4c18-bfd9-054b9803038c", "created_at": 1721205487, "task_id": "3bf8a0bb-e73b-4690-9e66-4e429bad8ee7", "audio": "qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq"}
       data: {"event": "tts_message_end", "conversation_id": "23dd85f3-1a41-4ea0-b7a9-062734ccfaf9", "message_id": "a8bdc41c-13b2-4c18-bfd9-054b9803038c", "created_at": 1721205487, "task_id": "3bf8a0bb-e73b-4690-9e66-4e429bad8ee7", "audio": ""}
         For text messages generated by Dify, simply pass the generated message-id directly. The backend will use the message-id to look up the corresponding content and synthesize the voice information directly. If both message_id and text are provided simultaneously, the message_id is given priority.
       </Property>
       <Property name='text' type='str' key='text'>
-        Speech generated content。
+        Speech generated content.
       </Property>
       <Property name='user' type='string' key='user'>
         The user identifier, defined by the developer, must ensure uniqueness within the app.