Update Guide to use Illustrator examples instead of Photoshop

[ErinFinnegan]

Submit an issue

Topic

Since Photoshop on the M1 no longer supports CEP, we should update this guide with non-Photoshop examples.

Also, we should update it to CEP 12, as the current guide is still using CEP 8.

This is an issue regarding:

• [ x ] The guides contained within this repo.
• The samples contained within this repo.

Versions

• CEP version(s) used [must be 8.x+ for this repo]:
• Supported CC app(s) and version(s):

Description of the issue

Proposed solution or attempted solutions that failed