fix typo

app.py

@@ -213,7 +213,7 @@ def handle_user_input(user_input):
         st.session_state["messages"].append({"role": "assistant", "content": response, "warning": stream_warning, "error": stream_error})
 
 def feedback():
-    with st.form("feedback_form")():
+    with st.form("feedback_form"):
         st.title("Feedback Form")
         sentiment_mapping = [":material/thumb_down:", ":material/thumb_up:"]
         # rating = None