chore(template-explorer): fix overflow screen problem (#7282) [ci skip]

packages/template-explorer/style.css

@@ -1,5 +1,6 @@
 body {
   margin: 0;
+  overflow: hidden;
   font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
   --bg: #1D1F21;
   --border: #333;