ci: open an issue when a package fails to update

README.md

@@ -10,6 +10,9 @@ package's upstream for a new release. When one is found it:
 3. commits the changes back to this repository, and
 4. pushes the package files to the AUR.
 
+If a package fails to update, the [notify workflow](.github/workflows/notify.yml)
+opens an issue for it. The issue closes once that package updates again.
+
 ## Ground rule
 
 **This repository never hosts a binary.** Every `PKGBUILD` sources what