Update free-courses-bn.md (#10409)

* Update free-courses-bn.md

* Update free-courses-de.md  python

* Update free-courses-mr.md

* Update free-courses-hi.md

* Update free-courses-bn.md

please approve this because it is in alphabetical form now

* alphabetize

* not a course

* playlist

* alphabetize

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Co-authored-by: Eric Hellman <eric@hellman.net>

courses/free-courses-de.md

@@ -81,6 +81,7 @@
 
 * [Programmieren lernen mit Python](https://www.youtube.com/playlist?list=PLL1BYAeNY0gzHheN7kCLEhPDegdHrAyDh)
 * [Programmieren Lernen: Python Tutorial](https://www.youtube.com/playlist?list=PL_tdPUem3eE_k40i65IdRPWrAZxoHcN4o)
+* [Programmieren Starten: Python Tutorial](https://www.youtube.com/playlist?list=PL_pqkvxZ6ho3u8PJAsUU-rOAQ74D0TqZB)
 * [Python-Kurs (Python 2)](https://www.python-kurs.eu/kurs.php)
 * [Python-Kurs (Python 3)](https://www.python-kurs.eu/python3_kurs.php)
 * [Python Tkinter Tutorial deutsch / german (Crashkurs)](https://www.youtube.com/playlist?list=PL_pqkvxZ6ho23EXCx7HJtOaUZ-mDl_GXY) - Programmieren Starten

courses/free-courses-hi.md

@@ -401,6 +401,7 @@
 
 ### iOS
 
+* [Getting Started with iOS in Hindi](https://www.youtube.com/playlist?list=PL5PR3UyfTWvcRhz4ms-nNoGja2-DkA_6T) - iOS Academy
 * [iOS App development Course - Hindi - Xcode 9 - Swift 4](https://www.youtube.com/playlist?list=PL27xikYyFh9Cg5f28LpQuoRL8LEs01_zT) - Confiance Labs
 * [iOS App Development Crash Course in Hindi](https://www.youtube.com/watch?v=n7qOGHWunUY) - Akash Padhiyar
 * [IOS Mobile App Development Tutorial for beginners](https://www.youtube.com/playlist?list=PLtCBuHKmdxOcmrDx2pM4qNvzWF2NI_Qlo) - Fahad Hussain

courses/free-courses-mr.md

@@ -27,6 +27,7 @@
 
 ### Arduino
 
+* [Arduino Advanced मराठीमध्ये](https://www.youtube.com/playlist?list=PLYearvGpQL11nJ0duF_ZTE6Ks4-ML6WBS) - Marathi Computer
 * [Arduino Programming in Marathi](https://youtube.com/playlist?list=PL8yOrZ6_TOt5Y-ZG34wLePPZsDaZpatqD) - Asawari Shiposkar