added free-courses-yb.md

[Yadavbalbir]

What does this PR do?

Added Courses

For resources

Description

added free courses on MATLAB and Simulink

Why is this valuable (or not)?

These courses are certified courses and in high demand for those wanting to use MATLAB and Simulink in engineering courses.

How do we know it's really free?

All courses are self-placed and free provided by mathsworks.com. I have personally taken one of these courses.

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

Checklist:

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

Follow-up

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

[shrn01]

Please add the resources to one of the existing files. Read docs/CONTRIBUTING.md for more information

[Yadavbalbir]

@shrn01 made changes

[shrn01]

courses/free-courses-km.md is for resources in Khmer language. For english you might want to add them in courses/free-courses-en.md

[shrn01]

Looks like this is a paid course. Please remove

[eshellman]

use the existing categories!

[shrn01]

closes #8848

[eshellman]

I think you want to make 'simulink' a subcategory of 'MATLAB'