README.md: Fix Gnome touch scroll issue link

Author: spbnick

README.md

@@ -305,7 +305,7 @@ firmware on how to disable Secure Boot.
 ### Touch ring/strip scrolling doesn't work in Gnome ###
 
 Scrolling with a touch ring or a touch strip [doesn't
-work](gnome_touch_scroll_issue) in Gnome version 3.24 and later. At the moment
+work][gnome_touch_scroll_issue] in Gnome version 3.24 and later. At the moment
 there doesn't seem to be a workaround beside not using Gnome.
 
 Support