Added a free course in free-courses-hi.md

[RishitPrabhu]

What does this PR do?

Add resource

For resources

Description

This course is designed to guide complete beginners through the basics, starting with foundational concepts of Node.js, server creation, and JavaScript execution outside the browser.

Why is this valuable (or not)?

This course is valuable because it provides a comprehensive, beginner-friendly introduction to Node.js in Hindi.

How do we know it's really free?

It is available for free on Youtube

For book lists, is it a book? For course lists, is it a course? etc.

It is a video series

Checklist:

• [x] Read our contributing guidelines.
• [x] Search for duplicates.
• [x] Include author(s) and platform where appropriate.
• [x] Put lists in alphabetical order, correct spacing.
• [x] Add needed indications (PDF, access notes, under construction).
• [x] Used an informative name for this pull request.

Follow-up

• Check the status of GitHub Actions and resolve any reported warnings!