Updated favorite item endpoint

[floriegl]

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[floriegl]

Fixes #459 (Currently having issues and not really the time to get peotry working to run all the run configs, but it works on my own instance without issues and the code did not change any logic)

[codecov]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (bc79e7c) 64.67% compared to head (e1d0f24) 64.70%.
Report is 23 commits behind head on dev.

Files	Patch %	Lines
tgtg_scanner/models/config.py	47.36%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #460      +/-   ##
==========================================
+ Coverage   64.67%   64.70%   +0.02%     
==========================================
  Files          26       26              
  Lines        2231     2244      +13     
==========================================
+ Hits         1443     1452       +9     
- Misses        788      792       +4     

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[Der-Henning]

Thank you for your fast fix.