docs: release notes for the v19.2.0-rc.0 release #7336

Job	Run time
build	2m 14s
lint	2m 5s
test	1s
publish-snapshots	1s
Browser Compatibility Tests	1s
e2e	1s
e2e-package-managers	1s
e2e-snapshots	1s
	4m 25s

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