Update global.json (#778) #1374

Job	Run time
check_documentation	33s
compute_package_version	4s
build_and_test (ubuntu-latest, Release, roslyn3.8)	2m 20s
build_and_test (ubuntu-latest, Release, roslyn4.2)	2m 19s
build_and_test (ubuntu-latest, Release, roslyn4.4)	2m 25s
build_and_test (ubuntu-latest, Release, roslyn4.6)	2m 20s
build_and_test (ubuntu-latest, Release, roslyn4.8)	2m 9s
build_and_test (ubuntu-latest, Release, default)	2m 3s
build_and_test (windows-latest, Release, roslyn3.8)	4m 43s
build_and_test (windows-latest, Release, roslyn4.2)	4m 33s
build_and_test (windows-latest, Release, roslyn4.4)	4m 31s
build_and_test (windows-latest, Release, roslyn4.6)	4m 54s
build_and_test (windows-latest, Release, roslyn4.8)	4m 10s
build_and_test (windows-latest, Release, default)	4m 46s
create_nuget	2m 2s
validate_nuget	1m 13s
deploy	22s
create_release	6s
	45m 33s

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