Update app.py

Add name of maintainers and contributors to the slidebar.

app.py

@@ -11,6 +11,17 @@ with st.sidebar:
     "[How to get your openai API key?](https://elephas.app/blog/how-to-get-chatgpt-api-key-clh93ii2e1642073tpacu6w934j)" ## Mr.Shen: Add a superlink to show how to get an Openai API key
     "[![Visit out Huggingface Space](https://huggingface.co/datasets/huggingface/badges/raw/main/powered-by-huggingface-light.svg)](https://huggingface.co/TGSAI)"
 
+    st.markdown("""
+                ##### Maintainers: 
+                - Gavin Wu 
+                - Samuel Moffitt
+
+                ##### Contributors:
+                - David Pan
+                - Wei Wang
+                        
+                
+                """)
 
 #### The main layouts start here ####