Add Learn AutoIt Vietnamese

[torn4dom4n]

What does this PR do?

Add resource(s)

For resources

Description

How do we know it's really free?

You can check the site's description. It's really free.

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

It's a course.

Checklist:

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