new: Add sidebar heading

app.py

@@ -28,6 +28,7 @@ def render_entities(doc, colors: dict, options: dict) -> str:
 
 
 st.header("Location Recognition Demo 🔎🌆🌍")
+st.sidebar.header("Information ℹ")
 st.sidebar.markdown(
     """
 This example application accompanies the blog post: [Extracting useful information from documents with Named Entity Recognition]().