docs(faq): rewrite github hosted app section (#23184)

Co-authored-by: Róbert Papp <papp.robert.s@gmail.com>
Co-authored-by: Rhys Arkins <rhys@arkins.net>

docs/usage/faq.md

@@ -29,10 +29,12 @@ The Renovate team only fixes bugs in an older version if:
 If you're using the hosted app, you don't need to do anything, as the Renovate maintainers update the hosted app regularly.
 If you're self hosting Renovate, use the latest release if possible.
 
-## When are new Renovate OSS releases added to the hosted Mend Renovate App?
+## When is the Mend Renovate GitHub hosted app updated with new Renovate versions?
 
-The Renovate maintainers manually update the hosted app.
+The Renovate maintainers manually update the GitHub hosted app.
+The maintainers don't follow any release schedule or release cadence.
 This means the hosted app can lag a few hours to a week behind the open source version.
+Major releases of Renovate are held back until the maintainers are reasonably certain it works for most users.
 
 ## Renovate core features not supported on all platforms