Added RHCSA and Python3 courses (#9107)

* Added RHCSA and Python3 courses

* Update free-courses-en.md

* Sort via alphabetical order

Author: raoshaab

Diff for: courses/free-courses-en.md

@@ -935,6 +935,7 @@
 
 ### Linux
 
+* [IIEC RISE 1.0 RHCSA8 and Python3](https://www.youtube.com/playlist?list=PLAi9X1uG6jZ2b1mUmrUcc_aEoc8tfss8e) - Vimal Daga 
 * [Introduction To Linux](https://www.edx.org/course/introduction-to-linux/) - The Linux Foundation (edx)
 * [Linux Administration Tutorial Videos](https://www.youtube.com/playlist?list=PL9ooVrP1hQOH3SvcgkC4Qv2cyCebvs0Ik) - edureka!
 * [Linux Command Line](https://www.udemy.com/course/command-line/) - Adam Eubankas (Udemy)