* Update Rust Courses

Added Rust Courses which were good in quality on YouTube and beginner friendly.

* Update free-courses-en.md

Changed the order of resources.

* Update free-courses-en.md

Update

* Update free-courses-en.md

Removed a blank line. Lint problems fixed.

* Update free-courses-en.md

Update

* Update free-courses-en.md

Removed YouTube..