Minor typo fix.

less/reset.less

@@ -108,7 +108,7 @@ input[type="button"],
 input[type="reset"],
 input[type="submit"] {
   cursor: pointer; // Cursors on all buttons applied consistently
-  -webkit-appearance: button; // Style clicable inputs in iOS
+  -webkit-appearance: button; // Style clickable inputs in iOS
 }
 input[type="search"] { // Appearance in Safari/Chrome
   -webkit-appearance: textfield;