Ci: enable windows

[ThomasWaldmann]

[codecov[bot]]

Codecov Report

:x: Patch coverage is 80.95238% with 4 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 81.03%. Comparing base (1589489) to head (744001a). :warning: Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/borg/helpers/parseformat.py	71.42%	3 Missing and 1 partial :warning:

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #9170   +/-   ##
=======================================
  Coverage   81.03%   81.03%           
=======================================
  Files          77       77           
  Lines       13627    13637   +10     
  Branches     2039     2040    +1     
=======================================
+ Hits        11042    11051    +9     
- Misses       1912     1913    +1     
  Partials      673      673           

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