Fix broken link in README.md for "Build an App in Pure JS" tutorial

[theinshort]

Issue #512 In javascript section, Build an App in Pure JS link is not working resolved

Build an App in Pure JS link was not working due to the "ERROR 410 User deactivated or deleted their account". New URL for this post is updated in the README.md file.

Description

This pull request updates the broken link in the README.md file that previously pointed to a "Build an App in Pure JS" tutorial. The original link resulted in a "410 User deactivated or deleted their account" error.

Motivation and Context

This change is required to fix a broken link in the README.md file. The original link pointed to a "Build an App in Pure JS" tutorial, but the user who created that resource deactivated or deleted their account, resulting in a "410 User deactivated or deleted their account" error. This broken link provides a poor user experience and prevents users from accessing the intended resource.

How Has This Been Tested?

I've tested this change by manually verifying the following:

• Updated Link: I confirmed that the new URL in the README.md file opens a functioning webpage.
• Functionality: I accessed the webpage through the new link and ensured it provides the expected "Build an App in Pure JS" tutorial content.

Types of changes

• Content Update (change which fixes an issue or updates an already existing submission)
• New Article (change which adds functionality)
• Documentation change

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have made checks to ensure URLs and other resources are valid