Update app.py

app.py

@@ -27,8 +27,8 @@ supervised by [Guanyi Chen](https://a-quei.github.io/) (During his time in Utrec
 To use this space:
 
 1. Have a paper that you want to turn into slides.
-2. Process your paper using GROBID. If you have GROBID installed, run it and use the output. If not, you can use GROBID’s live demo to generate the 
-processed TEI.xml file. To use the live demo, click on `TEI`, select `Process Fulltext Document` under Service to call, choose the paper file, and then
+2. Process your paper using GROBID. If you have GROBID installed, run it and use the output. If not, you can use GROBID’s [live demo](https://kermitt2-grobid.hf.space/)
+to generate the processed TEI.xml file. To use the live demo, click on `TEI`, select `Process Fulltext Document` under Service to call, choose the paper file, and then
 click `submit`.
 """)