docs: release notes for the v20.0.2 release #1297

Job	Run time
list	26s
workflow (devkit-core-tests-rerun)	1m 16s
workflow (devkit-core-tests)	1m 14s
workflow (modules-builder-tests)	1m 41s
workflow (build-cli)	1m 38s
workflow (build-unit-tests)	2m 14s
	8m 29s

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