Handle Git Actor and Permissions

[blink1073]

Fixes #423

[codecov-commenter]

Codecov Report

Base: 81.59% // Head: 81.27% // Decreases project coverage by -0.31% ⚠️

Coverage data is based on head (978ebce) compared to base (17959a9).
Patch coverage: 16.66% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #429      +/-   ##
==========================================
- Coverage   81.59%   81.27%   -0.32%     
==========================================
  Files          20       20              
  Lines        2776     2783       +7     
  Branches      358      360       +2     
==========================================
- Hits         2265     2262       -3     
- Misses        385      393       +8     
- Partials      126      128       +2     

Impacted Files	Coverage Δ
jupyter_releaser/tests/test_cli.py	98.85% <ø> (ø)
jupyter_releaser/util.py	70.96% <0.00%> (-0.93%)	⬇️
jupyter_releaser/lib.py	77.71% <33.33%> (-1.15%)	⬇️

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