Update main.py

main.py

@@ -13,7 +13,7 @@ app = FastAPI(title="Notionhive Chatbot")
 # Enable CORS for frontend
 app.add_middleware(
     ProxyHeadersMiddleware, 
-    trusted_hosts="*",
+    trusted_hosts=["*"],
     CORSMiddleware,
     allow_origins=["*"],
     allow_credentials=True,