fix(windows): powershell arguments for start-process

[prolifel]

fix for this issue: https://github.com/air-verse/air/issues/775

kindly review this PR @cosmtrek

thank you

[codecov[bot]]

Codecov Report

:x: Patch coverage is 0% with 27 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
runner/util.go	0.00%	27 Missing :warning:

Files with missing lines	Coverage Δ
runner/util.go	65.16% <0.00%> (-5.29%)	:arrow_down:

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