Fix norbits provider not returning results. Fixes #3846

[medariox]

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Thanks to @massifman and @labrys for finding the issue and suggesting the fix.

[labrys]

@medariox You didn't change the post data to json, was that intended?

[medariox]

@labrys Yeah, in the end it didn't make a difference at all.

[massifman]

@labrys @medariox No, I implemented the change on line 80(?) from
response = self.session.post(self.urls['search'], data=post_data)
to
response = self.session.post(self.urls['search'], json=post_data)
aswell, sorry if that was unclear in the issue thread.
Otherwise, it seems correct.

[medariox]

@massifman @labrys
I've changed to json, just in case. All changes should be there now.

[codecov-io]

Codecov Report

Merging #4007 into develop will decrease coverage by <.01%.
The diff coverage is 11.11%.

@@             Coverage Diff             @@
##           develop    #4007      +/-   ##
===========================================
- Coverage    29.39%   29.38%   -0.01%     
===========================================
  Files          277      277              
  Lines        35496    35496              
===========================================
- Hits         10433    10432       -1     
- Misses       25063    25064       +1

Impacted Files	Coverage Δ
medusa/providers/torrent/json/norbits.py	33.76% <11.11%> (-1.3%)	⬇️

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