docs: release notes for the v20.0.4 release #1673

Job	Run time
lint	2m 19s
build	2m 46s
e2e_windows (windows-2025, 22, npm, 0)	33m 42s
e2e_windows (windows-2025, 22, esbuild, 0)	29m 6s
e2e_windows (windows-2025, 22, npm, 4)	31m 52s
e2e_windows (windows-2025, 22, npm, 1)	40m 41s
e2e_windows (windows-2025, 22, npm, 3)	29m 24s
e2e_windows (windows-2025, 22, npm, 2)	32m 13s
e2e_windows (windows-2025, 22, esbuild, 1)	34m 1s
e2e_windows (windows-2025, 22, esbuild, 3)	40m 51s
e2e_windows (windows-2025, 22, npm, 5)	27m 51s
e2e_windows (windows-2025, 22, esbuild, 5)	36m 59s
e2e_windows (windows-2025, 22, esbuild, 2)	43m 18s
e2e_windows (windows-2025, 22, esbuild, 4)	41m 4s
publish-snapshots	4m 3s
test	1s
Browser Compatibility Tests	2m 48s
e2e-package-managers	1s
e2e-snapshots	1s
e2e	1s
	7h 13m 2s

Provide feedback