docs: release notes for the v20.1.0-rc.0 release #1688

Job	Run time
lint	2m 7s
e2e_windows (windows-2025, 22, npm, 2)	2m 24s
e2e_windows (windows-2025, 22, npm, 3)	39s
e2e_windows (windows-2025, 22, npm, 5)	1m 34s
e2e_windows (windows-2025, 22, npm, 0)	35s
e2e_windows (windows-2025, 22, esbuild, 4)	1m 12s
e2e_windows (windows-2025, 22, esbuild, 5)	2m 25s
e2e_windows (windows-2025, 22, esbuild, 3)	2m 40s
e2e_windows (windows-2025, 22, npm, 1)	37s
e2e_windows (windows-2025, 22, npm, 4)	1m 58s
e2e_windows (windows-2025, 22, esbuild, 2)	58s
e2e_windows (windows-2025, 22, esbuild, 0)	40s
e2e_windows (windows-2025, 22, esbuild, 1)	43s
build	17s
test	0s
publish-snapshots	0s
e2e-snapshots	0s
Browser Compatibility Tests	0s
e2e-package-managers	0s
e2e	0s
	18m 49s

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