fix: remove duplicate entry of Programming with Harry Django course in free-courses-en.md (#11714)

- Removed duplicate listing for "Programming with Harry" Django course in the Django section
- Renamed "Add Hyperskill free-courses-en.md" back to "free-courses-en.md" to maintain consistent file naming.

Co-authored-by: Hridyanshu7 <himank7794@gmail.com>

courses/Add Hyperksill free-courses-en.md → courses/free-courses-en.md

@@ -1559,10 +1559,9 @@
 * [Django 3.0 Crash Course Tutorials \| Customer Management App](https://www.youtube.com/playlist?list=PL-51WBLyFTg2vW-_6XBoUpE7vpmoR3ztO) - Dennis Ivy
 * [Django for Everybody](https://www.dj4e.com) - Charles R. Severence
 * [Django Tutorial for Beginners](https://www.youtube.com/playlist?list=PLsyeobzWxl7r2ukVgTqIQcl-1T0C2mzau) - Navin Reddy
-* [Django tutorial for Beginners](https://www.youtube.com/playlist?list=PLK8cqdr55Tsv-D2HMdrnD32oOVBNvmxjr) - ProgrammingWithHarry
 * [Django Tutorial for Beginners (2021)](https://www.youtube.com/watch?v=rHux0gMZ3Eg) - Moshfegh Hamedani (Programming with Mosh)
 * [Django Tutorials](https://www.youtube.com/playlist?list=PL-osiE80TeTtoQCKZ03TU5fNfx2UY6U4p) - Corey Schafer
-* [Django Tutorials for Beginners](https://www.youtube.com/playlist?list=PLK8cqdr55Tsv-D2HMdrnD32oOVBNvmxjr) - Programming With Harry(English)
+* [Django Tutorials for Beginners](https://www.youtube.com/playlist?list=PLK8cqdr55Tsv-D2HMdrnD32oOVBNvmxjr) - ProgrammingWithHarry
 * [Django Wednesdays](https://www.youtube.com/playlist?list=PLCC34OHNcOtqW9BJmgQPPzUpJ8hl49AGy) - Codemy.com
 * [Python Django Tutorial 2018 for Beginners](https://www.youtube.com/playlist?list=PL-J2q3Ga50oOpni_xS2PPUe4mf9lM96dD) - Clever Programmer
 * [Python Django Tutorial 2021](https://www.youtube.com/playlist?list=PL-51WBLyFTg1pUMaTJ4WSgnyvWfLGmwDm) - Dennis Ivy