Fix examples link

app.py

@@ -1,4 +1,4 @@
-from apps import mlm, vqa, article
+from apps import mlm, vqa, article, examples
 import streamlit as st
 from session import _get_state
 from multiapp import MultiApp
@@ -25,7 +25,7 @@ def main():
     app.add_app("Article", article.app)
     app.add_app("Visual Question Answering", vqa.app)
     app.add_app("Mask Filling", mlm.app)
-    app.add_app("Examples", mlm.app)
+    app.add_app("Examples", examples.app)
     app.run()
     state.sync()