🐛 Fix getting resources from variant group

[swiftyfinch]

Description

I've fixed getting resources from the variant group.
Without this fix a whole pod folder (even non-resources) is added to hash.

References

• 🐛 Build phases pbx variant group bug #282

Checklist (I have ...)

• 🧐 Followed the code style of the rest of the project
• 📖 Updated the documentation, if necessary
• 👨🏻‍🔧 Added at least one test which validates that my change is working, if appropriate
• 👮🏻‍♂️ Run make lint and fixed all warnings
• ✅ Run make test and fixed all tests

❤️ Thanks for contributing to the 🏈 Rugby!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (fb4647a) 37.24% compared to head (f92628f) 37.30%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #291      +/-   ##
==========================================
+ Coverage   37.24%   37.30%   +0.06%     
==========================================
  Files         142      142              
  Lines        4172     4176       +4     
==========================================
+ Hits         1554     1558       +4     
  Misses       2618     2618              

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