feat: upgrade to libgit2sharp 0.30.0 and libgit2 1.7.2

[jonisavo]

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[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 46.44%. Comparing base (252cdba) to head (ac8f098).

Files with missing lines	Patch %	Lines
...volainen.unitygit/GUI/Components/FileStatusItem.cs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #7      +/-   ##
==========================================
- Coverage   46.58%   46.44%   -0.14%     
==========================================
  Files          36       36              
  Lines        1039     1042       +3     
==========================================
  Hits          484      484              
- Misses        555      558       +3     

Flag	Coverage Δ
automated	46.44% <0.00%> (-0.14%)	⬇️

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