release: cut the v20.0.6 release #1431

Job	Run time
list	33s
workflow (modules-builder-tests)	1m 43s
workflow (devkit-core-tests)	1m 19s
workflow (build-cli)	1m 25s
workflow (devkit-core-tests-rerun)	1m 29s
workflow (build-unit-tests)	2m 19s
	8m 48s

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