Update app.py

app.py

@@ -42,7 +42,8 @@ with st.expander("🐈 About", expanded=False):
     st.markdown(
         """
         This is a **work in progress** streamlit version of our [Chat Noir](https://www.chatnoir.eu/) search engine. Chat Noir is an Elasticsearch-based search engine offering a freely accessible search interface for the two ClueWeb corpora and the Common Crawl, together about 3 billion web pages. This version of the search engine uses the [Search API](https://www.chatnoir.eu/doc/api/) by way of the Python [chatnoir-api] Package and is therefore not as fast as the main site.
-If you find this app in your research, please consider citing:
+
+If you find this project useful in your research, please consider citing:
  
 ```
 @InProceedings{bevendorff:2018,