Update documentation to account for the changes in #24952. docs/swarm/swarm-tutorial/rolling-update.md doesn't need any changes, but the CLI reference pages should show the current help text. drain-node.md no longer needs to specify --update-parallelism 1 in its example. Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com> Upstream-commit: 933ba8d7f7f95ad0bac97c39ffb3cdf1a5634cc6 Component: engine