* added redhat courses * updated * Update courses/free-courses-en.md Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com> * Update courses/free-courses-en.md Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com> * Update courses/free-courses-en.md Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com> * Update courses/free-courses-en.md * sort * Update courses/free-courses-en.md * Update courses/free-courses-en.md * Update courses/free-courses-en.md Co-authored-by: Eric Hellman <eric@hellman.net> Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com>