Bump pester version to 6.0.1

[github-actions]

Bump `pester` version

Update `pester` version in build.ps1

1 file(s) updated with "PesterVersion = '6.0.1',\n": * build.ps1

6.0.1

# Pester 6.0.1

Fixes an intermittent crash in `Run.Parallel` on Windows PowerShell 7. When several test files imported Pester at the same time, the concurrent, unsynchronized writes to a shared process-global verb dictionary could corrupt it and throw `Index was outside the bounds of the array`, which killed the parallel run. The verb patch is now guarded by a lock. (#2901)

No other changes from [6.0.0](https://github.com/pester/Pester/releases/tag/6.0.0).

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