Bump Verify.Xunit from 23.7.2 to 27.0.1 in the testing group #768

Job	Run time
build (macos-latest)	22s
build (ubuntu-latest)	39s
build (windows-latest)	2m 2s
lint-markdown	9s
integration (macos-latest, default)	33s
integration (macos-latest, bash)	32s
integration (macos-latest, pwsh)	32s
integration (ubuntu-latest, default)	1m 1s
integration (ubuntu-latest, bash)	49s
integration (ubuntu-latest, pwsh)	45s
integration (windows-latest, default)	3m 24s
integration (windows-latest, pwsh)	3m 51s
integration (windows-latest, C:\Program Files\Git\bin\bash.exe)	2m 37s
release	0s
	17m 16s

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