clean code

lib/views/admin/customize.html

@@ -449,7 +449,7 @@ window.addEventListener('load', (event) => {
       // selected value
       var val = event.target.value
       // replace css url
-      // see https://regex101.com/r/gBNZYu/3
+      // see https://regex101.com/r/gBNZYu/4
       highlightJsCssDOM.href = highlightJsCssDOM.href.replace(/[^/]+\.css$/, `${val}.css`);
     }