Always display windows update step

[vzze]

Standards checklist:

• The PR title is descriptive.
• I have read CONTRIBUTING.md
• The code compiles (cargo build)
• The code passes rustfmt (cargo fmt)
• The code passes clippy (cargo clippy)
• The code passes tests (cargo test)
• Optional: I have tested the code myself

I was wondering why the Windows Update step disappeared in the newest version, it seems
to be disabled if you don't have the correct powershell module installed, however I think
it is useful for the step to always appear in order to inform the user about the problem.

This is how it looks now:

Please ignore changes to CONTRIBUTING.md my auto-formatter removed redundant white-space characters

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 6.51%. Comparing base (614131b) to head (f09be5c).

Files	Patch %	Lines
src/steps/os/windows.rs	0.00%	7 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            main    #781      +/-   ##
========================================
- Coverage   6.51%   6.51%   -0.01%     
========================================
  Files         37      37              
  Lines      12396   12402       +6     
========================================
  Hits         808     808              
- Misses     11588   11594       +6     

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[SteveLauC]

Yeah, I think this is better