docs: release notes for the v18.2.16 release #804

Job	Run time
list	24s
workflow (build-cli)	1m 34s
workflow (modules-builder-tests)	1m 41s
workflow (devkit-core-tests)	1m 15s
workflow (devkit-core-tests-rerun)	1m 21s
workflow (build-unit-tests)	2m 18s
	8m 33s

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