nuget: bump SkiaSharp.NativeAssets.Linux and SkiaSharp #4

Job	Run time
format	3m 10s
pr_build / macOS Universal (Debug)	5m 48s
pr_build / win-x64 (Debug)	9m 13s
pr_build / macOS Universal (Release)	6m 0s
pr_build / linux-x64 (Debug)	5m 8s
pr_build / linux-arm64 (Debug)	3m 5s
pr_build / osx-x64 (Debug)	4m 40s
pr_build / win-x64 (Release)	8m 33s
pr_build / linux-x64 (Release)	4m 26s
pr_build / linux-arm64 (Release)	3m 0s
pr_build / osx-x64 (Release)	3m 55s
	56m 58s

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