docs: update release doc with script to remove prerelease versions #350

Job	Run time
list	39s
workflow (build-cli)	2m 11s
workflow (modules-builder-tests)	2m 24s
workflow (devkit-core-tests)	1m 50s
workflow (devkit-core-tests-rerun)	1m 52s
workflow (build-unit-tests)	2m 25s
	11m 21s

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