The Desktop app doesn’t get the notifications of a new release and won’t self update so it would be a case of checking the website for a new version. If it helps looking at the download page the latest version is 0.209.4 which is Desktop version 1.9.0
Just to give some more color, why we can not also release weekly.
Releasing Desktop, is a very manual and time-consuming process. For that reason, would a weekly release cycle be too much. Also it it important to understand that Dekstop is mainly meant so that people can give n8n a spin. It is not meant for long-term production use. There we recommend self-hosting n8n via Docker or n8n cloud.