fix(nlp):add ',' to fix an error in response generation

app/routes/nlp.py

@@ -33,7 +33,7 @@ def load_model_nlp():
 
 @router.post("/chat")
 async def chat(request: Request, chat_request: ChatRequest):
-    """Endpoint do chatowania z modelem"""
+    """Endpoint for chat with the NLP model."""
     text = chat_request.message
     
     # Download model from app state
@@ -51,8 +51,8 @@ async def chat(request: Request, chat_request: ChatRequest):
         max_tokens=512,
         temperature=0.7,
         top_p=0.9,
-        top_k=50
-        stop=["<|im_end|>"]
+        top_k=50,
+        stop=["<|im_end|>"],
     )
     
     # Extract response text