[Glitch] fix: Remove focus highlight when status is clicked in light mode

Port 3c0767f543 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/styles/mastodon-light/diff.scss

@@ -101,7 +101,7 @@
 }
 
 // Change the background colors of statuses
-.focusable:focus {
+.focusable:focus-visible {
   background: lighten($white, 4%);
 }