DevRoadmap: add NetSpell #2959

Job	Run time
linux-vanilla--stockdotnet6-and-newmono	5m 29s
linux-github--dotnet-and-mono	3m 43s
linux-github--dotnet-and-newmono	6m 34s
linux-vanilla--newmono-only	7m 36s
linux-vanilla--stockdotnet6-and-stockmono	6m 17s
linux-vanilla--stockdotnet6-only	4m 38s
linux-vanilla--stockmono-only	3m 21s
macOS--dotnet6-and-mono	4m 52s
macOS--dotnet6-only	5m 27s
macOS--mono-only	11m 5s
windows--dotnet6-and-legacyFramework	6m 10s
windows--dotnet6-only	6m 10s
windows--legacyFramework-only	12m 26s
conventions	0s
snap_pkg	0s
	1h 23m 48s

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