release: cut the v21.2.0 release #2761

Job	Run time
build	20s
lint	1m 48s
build-e2e-windows	29s
test	0s
Browser Compatibility Tests	0s
publish-snapshots	0s
e2e	0s
e2e-snapshots	0s
e2e-package-managers	-1s
e2e-windows	0s
	2m 36s

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