Update free-courses-en.md (#8379)

Added a course on C programming.

courses/free-courses-en.md

@@ -264,6 +264,7 @@
 * [C Language Tutorial for Beginners (With Notes)](https://www.youtube.com/watch?v=_MF8L7ZxwRE) - ProgrammingWithHarry (YouTube)
 * [C Programming](https://www.youtube.com/playlist?list=PLBlnK6fEyqRggZZgYpPMUxdY1CYkZtARR) - Sujeet Singh (Neso Academy)
 * [C Programming & Data Structures](https://www.youtube.com/playlist?list=PLBlnK6fEyqRhX6r2uhhlubuF5QextdCSM) - Sujeet Singh (Neso Academy)
+* [C Programming for Beginners](https://www.youtube.com/playlist?list=PL98qAXLA6aftD9ZlnjpLhdQAOFI8xIB6e) - Programiz
 * [C Programming Tutorial](https://www.youtube.com/playlist?list=PL_RGaFnxSHWoGzOXqtKeM71OLpvZbuU0P)
 * [C Programming Tutorial for Beginners](https://www.youtube.com/watch?v=KJgsSFOSQv0) - Mike Dane (freeCodeCamp)
 * [Programming in C](https://www.youtube.com/playlist?list=PLdo5W4Nhv31a8UcMN9-35ghv8qyFWD9_S) - Jenny's lectures CS/IT NET&JRF