Fix nuget sanitycheck #2804

Job	Run time
macOS--mono-only	4m 43s
macOS--dotnet6-only	1m 21s
linux-github--dotnet-and-mono	4m 1s
linux-github--dotnet-and-newmono	7m 21s
linux-vanilla--stockdotnet6-and-newmono	6m 39s
linux-vanilla--stockdotnet6-only	5m 36s
linux-vanilla--stockmono-only	6m 56s
macOS--dotnet6-and-mono	16m 34s
windows--dotnet6-and-legacyFramework	9m 11s
windows--dotnet6-only	8m 47s
windows--legacyFramework-only	15m 32s
linux-vanilla--newmono-only	3m 55s
linux-vanilla--stockdotnet6-and-stockmono	7m 18s
conventions	0s
snap_pkg	0s
	1h 37m 54s

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