Bump xunit from 2.9.0 to 2.9.1 (#1722) #1031

Job	Run time
MacOS (Q8/Q16/Q16-HDRI)	3m 36s
MacOS (Q8/Q16/Q16-HDRI, arm64)	2m 14s
Linux (Q8/Q16/Q16-HDRI, x64)	4m 38s
Linux musl (Q8/Q16/Q16-HDRI, x64)	4m 6s
Library (Core)	6m 37s
Library (SystemDrawing)	6m 34s
Windows (Q8, x86)	8m 18s
Library (SystemWindowsMedia)	8m 7s
Windows (Q8, x64)	8m 0s
Windows (Q8, arm64)	6m 45s
Windows (Q8, Any CPU)	8m 52s
Windows (Q8-OpenMP, x64)	7m 40s
Windows (Q8-OpenMP, arm64)	6m 34s
Windows (Q16, x86)	8m 47s
Windows (Q16, x64)	9m 11s
Windows (Q16, arm64)	7m 43s
Windows (Q16, Any CPU)	9m 18s
Windows (Q16-OpenMP, x64)	7m 34s
Windows (Q16-OpenMP, arm64)	6m 1s
Windows (Q16-HDRI, x86)	9m 45s
Windows (Q16-HDRI, x64)	9m 20s
Windows (Q16-HDRI, arm64)	5m 55s
Windows (Q16-HDRI, Any CPU)	9m 31s
Windows (Q16-HDRI-OpenMP, x64)	7m 40s
Windows (Q16-HDRI-OpenMP, arm64)	6m 48s
	2h 59m 34s

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