Update free-programming-books-he.md

[shabtaisharon]

What does this PR do?

Add resource(s)

For resources

Description

Why is this valuable (or not)?

How do we know it's really free?

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)

Follow-up

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

[davorpa]

• [ x] Add needed indications (PDF, access notes, under construction)

On editing, remember use [x] (without whitespaces) to mark tasklist items, or do it later interactively from details view.

[shabtaisharon]

• [ x] Add needed indications (PDF, access notes, under construction)

On editing, remember use [x] (without whitespaces) to mark tasklist items, or do it later interactively from details view.

Done!

[eshellman]

Thanks, and welcome to free-programming-books!