Confluence Roadmap plugin site is not updated

Steps to replicate
Navigate to this link https://marketplace.atlassian.com/plugins/com.atlassian.confluence.plugins.confluence-roadmap-plugin

Observed behaviour
Confluence roadmap plugin is supported only by Confluence Server 5.6 - 5.6.6

Expected behaviour
Confluence roadmap plugin is bundled with Confluence 5.7 as stated in this link. The site should be updated to avoid user to confused.