Add ToC placeholder to examples

apps/article.py

@@ -7,7 +7,7 @@ def app(state=None):
     toc = Toc()
     st.info("Welcome to our Multilingual-VQA demo. Please use the navigation sidebar to move to our demo, or scroll below to read all about our project. 🤗 In case the sidebar isn't properly rendered, please change to a smaller window size and back to full screen.")
     
-    st.header("Table of contents")
+    st.header("Table of Contents")
     toc.placeholder()
     
     toc.header("Introduction and Motivation")

apps/examples.py

@@ -2,7 +2,9 @@ import streamlit as st
 from .utils import Toc
 def app(state=None):
     toc = Toc()
-    
+    st.header("Table of Contents")
+    toc.placeholder()
+
     toc.header("VQA Examples")
     toc.subheader("Color Questions")
     col1, col2, col3 = st.beta_columns([1,1,1])