CI: On Windows, use GNU's patch.exe instead of Strawberry Perl patch

[oSoMoN]

Before this PR:

test result: FAILED. 25 passed; 16 failed; 0 ignored; 0 measured; 0 filtered out

After this PR:

test result: FAILED. 38 passed; 3 failed; 0 ignored; 0 measured; 0 filtered out

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.63%. Comparing base (5669f16) to head (bf10464).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #57      +/-   ##
==========================================
- Coverage   80.92%   80.63%   -0.30%     
==========================================
  Files          10       10              
  Lines        2695     2706      +11     
  Branches      668      679      +11     
==========================================
+ Hits         2181     2182       +1     
- Misses        494      504      +10     
  Partials       20       20              

Flag	Coverage Δ
macos_latest	80.92% <ø> (ø)
ubuntu_latest	75.72% <ø> (?)

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[sylvestre]

excellent, thanks!