Updated unit test due to changes in ImageMagick. #945

Job	Run time
MacOS (Q8/Q16/Q16-HDRI)	3m 9s
Linux (Q8/Q16/Q16-HDRI, x64)	4m 17s
Linux musl (Q8/Q16/Q16-HDRI, x64)	3m 48s
Library (Core)	6m 3s
Library (SystemDrawing)	7m 47s
MacOS (Q8/Q16/Q16-HDRI, arm64)	2m 3s
Library (SystemWindowsMedia)	6m 44s
Windows (Q8, x86)	9m 35s
Windows (Q8, x64)	8m 2s
Windows (Q8, arm64)	10m 3s
Windows (Q8, Any CPU)	7m 2s
Windows (Q8-OpenMP, x64)	8m 8s
Windows (Q8-OpenMP, arm64)	6m 5s
Windows (Q16, x86)	9m 35s
Windows (Q16, x64)	9m 8s
Windows (Q16, arm64)	7m 27s
Windows (Q16, Any CPU)	10m 50s
Windows (Q16-OpenMP, x64)	8m 8s
Windows (Q16-OpenMP, arm64)	7m 55s
Windows (Q16-HDRI, x86)	11m 37s
Windows (Q16-HDRI, x64)	8m 35s
Windows (Q16-HDRI, arm64)	6m 50s
Windows (Q16-HDRI, Any CPU)	8m 58s
Windows (Q16-HDRI-OpenMP, x64)	7m 46s
Windows (Q16-HDRI-OpenMP, arm64)	9m 1s
	3h 8m 36s

Provide feedback