Added Nextjs Resources in free-courses-ur.md (#11697)
* Added Nextjs Resources in free-courses-ur.md
* corrected spacing
* Update courses/free-courses-ur.md
Co-authored-by: Eric Hellman <eric@hellman.net>
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Co-authored-by: Hridyanshu7 <himank7794@gmail.com>
Co-authored-by: Eric Hellman <eric@hellman.net>