add some text for the upstream documentation to make it less empty

docs/reference/example.md

@@ -3,6 +3,8 @@ title: Upstream Documentation
 description: Useful references for Aurora outside of the official documentation.
 ---
 
+If you can't find something that you're looking for, maybe our sister project docs or the official Fedora Kinoite documentation covers your point of interest. You can find them here:
+
 - [**Bluefin Documentation**](https://docs.projectbluefin.io/): Relevant information for Aurora outside of the GNOME specific tweaks and update channels.
 - [**Bazzite Documentation**](https://docs.bazzite.gg): Some information will not apply to Aurora, but most of it may be useful to reference for topics you are unsure about.
 - [**Fedora Kinoite Documentation**](https://docs.fedoraproject.org/en-US/fedora-kinoite/): Aurora would not exist without Fedora Kinoite, so it's best to reference technical information here.