feat(index): add empty line to even code box size (nodejs#8450)

* fix: fixed codebox height for active tab (nodejs#8425)

* fix: added an extra line to eliminate resizing of code block (nodejs#8425)

* fix: fixes variable codeblock size (nodejs#8425)

Author: ATiwari03-03-2004

apps/site/pages/en/index.mdx

@@ -102,6 +102,7 @@ layout: home
       createWriteStream('package.json.gz')
     );
 
+
     // run with `node streams.mjs`
     ```