Update app.py

app.py

@@ -78,7 +78,7 @@ if st.session_state.prev_option != selected_model:
 repo_id = model_links[selected_model]
 
 st.header(f'Liahona.AI')
-st.text(f'_powered_ by :violet[{selected_model}]')
+st.markdown(f'_powered_ by ***:violet[{selected_model}]***')
 # st.title(f'ChatBot Using {selected_model}')
 
 # Set a default model