Update app.py

app.py

@@ -123,6 +123,7 @@ page = st.sidebar.radio(
     [
         "🏠 Home",
         "ℹ️ About", 
+        "🆓 Open Source", 
         "📋 Terms of Use",
         "🔒 Privacy Policy",
         "📬 Contact"
@@ -164,6 +165,9 @@ if __name__ == "__main__":
     elif page_clean == "About":
         from src.about import main
         main()
+    elif page_clean == "About":
+        from src.open_source import main
+        main()
     elif page_clean == "Terms of Use":
         from src.terms_of_use import main
         main()