release: cut the v20.3.6 release #2127

Job	Run time
lint	2m 17s
build	29s
build-e2e-windows	17s
e2e-windows	-1s
test	0s
Browser Compatibility Tests	0s
publish-snapshots	0s
e2e-snapshots	0s
e2e	0s
e2e-package-managers	0s
	3m 2s

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