Minor fix: comment form style

assets/scss/style.scss

@@ -156,7 +156,7 @@ button, [type=button], [type=reset], [type=submit] {
   }
 }
 
-input[type=text], input[type=email]{
+input[type=text], input[type=email], input[type=url]{
   width: 100%;
   border: 1px solid var(--c-txt-alt);
   border-width: 0 0 1px 0;