docs: makes demo gif a link

Author: petethepig

README.md

@@ -15,7 +15,7 @@ It is currently in active development and is a little rough around the edges. Gi
 
 [🔥 Pyroscope Live Demo 🔥](https://demo.pyroscope.io/)
 
-![Pyroscope GIF Demo](https://user-images.githubusercontent.com/662636/103474522-a0322100-4d59-11eb-85f8-6eee7071a3e0.gif)
+[![Pyroscope GIF Demo](https://user-images.githubusercontent.com/662636/103474522-a0322100-4d59-11eb-85f8-6eee7071a3e0.gif)](https://demo.pyroscope.io/)
 
 
 ## Features