From LedHed's Wiki
Contents
Overview
Home Assistant updates are released on the first Wednesday of every month. You can update form the WebUI or from the CLI.
WebUI
There is an 'Updater' entity that will let you know if an update is available. Go to the Supervisor and there should be a card indicating the current version, and the latest version. Click 'Upgrade', Ideally create a backup/snapshot and download it to a safe place prior to performing the upgrade. You can download from the WebUI, or by accessing the 'backup/' directory (if you have SAMBA setup).
CLI
Updating to a specific version
ha core update --version 2021.10.7
References
Latest Release Notes https://www.home-assistant.io/latest-release-notes/