change [target='_blank'] arrow

the current arrow is shown in android as a square with a blue background

src/livecodes/styles/inc-modal.scss

@@ -380,7 +380,7 @@
   }
 
   a[target='_blank']::after {
-    content: '\2197';
+    content: '⬈';
     display: inline-block;
     margin: 0 0.3em;
     width: 0.7em;