fix: distrobox-export (#803)

Author: nicknamenamenick

system_files/desktop/shared/usr/share/ublue-os/motd/tips/10-ublue.md

@@ -1,5 +1,5 @@
 It is **always** better to install packages with Distrobox rather than layer them with rpm-ostree. `ujust distrobox` makes it easy!~[More info](https://universal-blue.discourse.group/docs?topic=35)
-Packages installed in Distrobox can be exported to appear like any other application~[View documentation](https://github.com/89luca89/distrobox/blob/main/docs/usage/distrobox-export.md)
+Packages installed in Distrobox can be exported to appear like any other application~[View documentation](https://distrobox.it/usage/distrobox-export/)
 *Update break something?* You can roll back and pin the previous release or rebase by build date~[View our guide](https://universal-blue.discourse.group/docs?topic=36)
 *This isn't a distro*, this is a custom image built on  Fedora Atomic Desktop technology~[View our mission](https://ublue.it/mission/)
 *Looking to dual-boot with  Windows?*~[View dual booting guide](https://universal-blue.discourse.group/docs?topic=129)