Use older version of maven gpg plugin to fix 401

[mdomasevicius]

Looks like recent release of maven gpg plugin introduced some kind of issues with authentication

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 37.79%. Comparing base (4a517cd) to head (f5f3ac0).
Report is 16 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6015      +/-   ##
==========================================
- Coverage   37.90%   37.79%   -0.11%     
==========================================
  Files         371      371              
  Lines       20665    20665              
==========================================
- Hits         7833     7811      -22     
- Misses      12054    12070      +16     
- Partials      778      784       +6     

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