docs: release notes for the v20.3.23 release #1879

Job	Run time
list	21s
workflow (devkit-core-tests)	23s
workflow (modules-builder-tests)	23s
workflow (devkit-core-tests-rerun)	23s
workflow (build-cli)	22s
workflow (build-unit-tests)	23s
	2m 15s

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