releng: update versions to 0.6.0Change-Id: I9bef1731e3e14f95b9bdfcdca51c92025dfe574bSigned-off-by: Patrick Tasse <patrick.tasse@gmail.com>Reviewed-on: https://git.eclipse.org/r/c/tracecompass.incubator/org.eclipse.tracecompass.incubator/+/202317Tested-by: Bernd Hufmann <bernd.hufmann@ericsson.com>Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>Reviewed-by: Bernd Hufmann <bernd.hufmann@ericsson.com>