docs: release notes for the v20.3.10 release #2395

Job	Run time
list	21s
workflow (build-cli)	1m 40s
workflow (modules-builder-tests)	1m 55s
workflow (build-unit-tests)	2m 32s
workflow (devkit-core-tests-rerun)	1m 32s
workflow (devkit-core-tests)	1m 24s
	9m 24s

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