refactor: batch 4

src/components/Key/MacCommandKey.tsx

@@ -1,9 +1,9 @@
 import { BsCommand } from 'react-icons/bs';
 import { Ruby } from '../Ruby';
 
-export function MacCommandKey() {
+export function MacCommandKey({ className }: { className?: string }) {
   return (
-    <Ruby caption="command">
+    <Ruby caption="command" className={className}>
       <kbd className="kbd">
         <BsCommand className="text-sm" />
       </kbd>