Focalboard v7.11.3 is the July 2023 release.
Mattermost: Install or upgrade to the latest version of Mattermost to automatically get Boards included. Or update to the latest version of the plugin by Downloading mattermost-plugin-focalboard.tar.gz
Personal / Development Server: Follow the install or upgrade guide
Major updates in this release:
Bug fixes, no major features
release-7.10...release-7.11