Update markdown-dark.css

Author: benhatsor

live-view/extensions/markdown/markdown-dark.css

@@ -30,7 +30,6 @@
 :focus-visible {
   box-shadow: 0 0 0 2px hsl(223deg 86% 64% / 50%);
   outline: none;
-  border-radius: 2px;
 }