fixed mime type error

app.py

@@ -72,7 +72,7 @@ async def embedding_output(message: str) -> list:
 
     async with aiohttp.ClientSession() as session:
         async with session.post(URL_EMBEDDING + "/embedding", json={"text": message}) as response:
-            response_json = await response.json()
+            response_json = await response.json(content_type=None)
     
     return response_json['output']