docs: release notes for the v20.1.2 release #1486

Job	Run time
list	24s
workflow (modules-builder-tests)	1m 50s
workflow (devkit-core-tests)	1m 17s
workflow (build-unit-tests)	2m 6s
workflow (devkit-core-tests-rerun)	1m 18s
workflow (build-cli)	1m 32s
	8m 27s

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