Update free-programming-books-langs.md

[kalpeshT101]

What does this PR do?

Shopify hydrogen tutorial

For resources

Description

Why is this valuable (or not)?

How do we know it's really free?

Official docs

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!

[eshellman]

please resolve conflicts.

[kalpeshT101]

@eshellman