Check documentation on CI #1342

Job	Run time
compute_package_version	7s
check_documentation	36s
build_and_test (ubuntu-latest, Release, roslyn3.8)	3m 9s
build_and_test (ubuntu-latest, Release, roslyn4.2)	3m 5s
build_and_test (ubuntu-latest, Release, roslyn4.4)	3m 4s
build_and_test (ubuntu-latest, Release, roslyn4.6)	3m 6s
build_and_test (ubuntu-latest, Release, roslyn4.8)	3m 8s
build_and_test (ubuntu-latest, Release, default)	3m 9s
build_and_test (windows-latest, Release, roslyn3.8)	7m 30s
build_and_test (windows-latest, Release, roslyn4.2)	7m 19s
build_and_test (windows-latest, Release, roslyn4.4)	7m 45s
build_and_test (windows-latest, Release, roslyn4.6)	6m 20s
build_and_test (windows-latest, Release, roslyn4.8)	6m 24s
build_and_test (windows-latest, Release, default)	7m 4s
create_nuget	2m 16s
validate_nuget	1m 6s
deploy	0s
create_release	0s
	1h 5m 8s

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