Notice in UI on updating the Terminal app + Fix a Release Notes link to point to the actual release page and not generic releases page

I've just acquired a new laptop, it installed "Windows Terminal Version: 1.6.10571.0" with Win11, and this Terminal is quite old, it doesn't even include a Settings UI. It would be nice if Terminal app included a way to update itself or at least a notice on this in About window.

Ideally there should be an easy updating mechanism no matter how WT is installed (if via msix, it should offer to download the latest msix etc)

Also clicking on Release Notes there in About window redirects to generic repo's release notes, and not notes of the specific release.

Start by tracing the About window's update notice and Release Notes link behavior for the Windows Terminal installation described. Define how update availability should be communicated across MSIX and other installation methods, and confirm that the link opens the specific release page; done requires both behaviors to work without leaving users at the generic releases page.

Written by the indexing model from the issue text.