Update app.py

app.py

@@ -13,7 +13,7 @@ show_pages(
 )
 
 st.title("Project in Text Mining and Application")
-st.title("Information Retrieval use a pre-trained model - ELECTRA")
+st.header("Information Retrieval use a pre-trained model - ELECTRA")
 st.markdown(
     """
     **Team members:**