Update twitter username (#3907)

src/data/guides/avoid-render-blocking-javascript-with-async-defer.md

@@ -3,7 +3,7 @@ title: 'Async and Defer Script Loading'
 description: 'Learn how to avoid render blocking JavaScript using async and defer scripts.'
 author:
   name: 'Kamran Ahmed'
-  url: 'https://twitter.com/kamranahmedse'
+  url: 'https://twitter.com/kamrify'
   imageUrl: '/authors/kamranahmedse.jpeg'
 seo:
   title: 'Async and Defer Script Loading - roadmap.sh'