Bump dotnet sdk from 8.0.407 to 8.0.408 #847

Job	Run time
build (macos-latest)	27s
build (ubuntu-latest)	33s
build (windows-latest)	2m 31s
lint-markdown	9s
integration (macos-latest, default)	36s
integration (macos-latest, bash)	34s
integration (macos-latest, pwsh)	51s
integration (ubuntu-latest, default)	53s
integration (ubuntu-latest, bash)	51s
integration (ubuntu-latest, pwsh)	46s
integration (windows-latest, default)	3m 24s
integration (windows-latest, pwsh)	2m 32s
integration (windows-latest, C:\Program Files\Git\bin\bash.exe)	2m 54s
release	0s
	17m 1s

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