Update presentation demo recording

README.md

@@ -15,7 +15,7 @@ listed in [FORK.md](https://gitlab.com/tslocum/cview/blob/master/FORK.md).
 
 `ssh cview.rocketnine.space -p 20000`
 
-[![Recording of presentation demo](https://gitlab.com/tslocum/cview/-/raw/master/cview.gif)](https://gitlab.com/tslocum/cview/tree/master/demos/presentation)
+[![Recording of presentation demo](https://gitlab.com/tslocum/cview/-/raw/master/cview.svg)](https://gitlab.com/tslocum/cview/tree/master/demos/presentation)
 
 Additional examples are listed on [pkg.go.dev](https://pkg.go.dev/gitlab.com/tslocum/cview?tab=importedby).