app.py fix

app.py

@@ -12,7 +12,7 @@ if "valid_inputs_received" not in st.session_state:
     st.session_state["valid_inputs_received"] = False
 
 
-def get_articles(query, fetcher) -> dict[str, list[str], str]:
+def get_articles(query, fetcher) -> Dict[str, List[str], str]:
     # Fetches articles using pymed. Increasing max_results results in longer loading times.
     results = fetcher.query(query, max_results=50)
     conclusions = []