Fix app and itnro

apps/article.py

@@ -1,7 +1,7 @@
 import streamlit as st
 from apps.utils import read_markdown
 
-def app():
+def app(state):
     st.write(read_markdown("abstract.md"))
     st.write(read_markdown("caveats.md"))
     st.write("## Methodology")

sections/mlm_intro.md

@@ -2,4 +2,4 @@ This demo uses a [CLIP-Vision-Bert model checkpoint](https://huggingface.co/flax
 
 The model can be used for mask-filling as shown in this demo. The caption can be present or written in any of the following: English, French, German and Spanish.
 
-For more details, click on `Usage` or `Article` 🤗 above.
+For more details, click on `Usage` above or `Article` on the sidebar. 🤗

sections/vqa_intro.md

@@ -2,4 +2,4 @@ This demo uses a [CLIP-Vision-Bert model checkpoint](https://huggingface.co/flax
 
 The model predicts one out of 3129 classes in English which can be found [here](https://huggingface.co/spaces/flax-community/Multilingual-VQA/blob/main/answer_reverse_mapping.json), and then the translated versions are provided based on the language chosen as `Answer Language`. The question can be present or written in any of the following: English, French, German and Spanish.
 
-For more details, click on `Usage` or `Article` 🤗 above.
+For more details, click on `Usage` above or `Article` on the sidebar. 🤗