Fix nuget sanitycheck #2799

Job	Run time
macOS--mono-only	6m 41s
macOS--dotnet6-only	1m 11s
linux-github--dotnet-and-newmono	9m 46s
linux-github--dotnet-and-mono	3m 49s
linux-vanilla--newmono-only	3m 38s
linux-vanilla--stockdotnet6-and-newmono	8m 0s
linux-vanilla--stockdotnet6-and-stockmono	8m 20s
linux-vanilla--stockdotnet6-only	5m 21s
linux-vanilla--stockmono-only	7m 3s
macOS--dotnet6-and-mono	20m 27s
windows--dotnet6-and-legacyFramework	8m 34s
windows--dotnet6-only	8m 44s
windows--legacyFramework-only	14m 22s
conventions	0s
snap_pkg	0s
	1h 45m 56s

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