🐛 Fix class

Author: risacan

index.html

@@ -14,7 +14,7 @@
     <button id="rgb(205, 90, 145)" class="pink">pink</button>
     <button id="rgb(75, 191, 107)" class="lightgreen">light green</button>
     <button id="rgb(0, 174, 204)" class="lightblue">light blue</button>
-    <button id="rgb(131, 140, 145)" class~"gray">gray</button>
+    <button id="rgb(131, 140, 145)" class="gray">gray</button>
     <script src="./index.js"></script>
   </body>
 </html>