update version in readme to 0.2.0 (#18) #17

Job	Run time
build-container (amd64, ubuntu-latest)	40s
build-container (arm64, ubuntu-24.04-arm)	37s
push-multiarch-manifest (quay.io/hybridcloudpatterns, true)	42s
push-multiarch-manifest (quay.io/validatedpatterns, false)	41s
	2m 40s

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