Update app.py

app.py

@@ -100,7 +100,7 @@ def main(query: str, client: QdrantClient, collection_name: str, llm: Llama, den
     prompt_1 = [
         {
             "role": "system", 
-            "content: You are a helpful assistant."
+            "content": "You are a helpful assistant."
         },
         {
             "role": "user",