Added License Notes to 2 Books

[adiba-anjum-26]

What does this PR do?

Add info based on #11355

For resources

Description

This PR adds license notes to the following books located at books

1. Computer Science I - Chris Bourke (PDF)
   License Line found on Page 3 of the PDF.
   "The entirety of this book is free and is released under a Creative Commons AttributionShareAlike 4.0 International License (see http://creativecommons.org/licenses/by-sa/4.0/ for details)."
   Added (CC BY-SA)

2. Computer Science II - Chris Bourke (PDF)
   License Line found on Page 3 of the PDF.
   "This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License"
   Added (CC BY-SA)

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

It's a book

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]

Thanks, and welcome to free-programming-books!