Inserted correct link for "Asynchronous JavaScript: How Callbacks, Promises, and Async-Await Work"

[uzair-suria]

The link for "Asynchronous JavaScript: How Callbacks, Promises, and Async-Await Work" was wrong. Currently it opens a YouTube video by Traversy Media for React Expense Tracker App.

Upon searching the title of the resource on Google, I found an article with exact same title on dev.to. I used that link to replace the wrong YouTube link