feat(deck): Add BoxBuddy to Bazzite Portal

Author: nicknamenamenick

system_files/deck/shared/usr/share/ublue-os/firstboot/yafti.yml

@@ -221,6 +221,7 @@ screens:
           - AppImage Pool: io.github.prateekmedia.appimagepool
           - Barrier: com.github.debauchee.barrier
           - Bitwarden: com.bitwarden.desktop
+          - BoxBuddy: io.github.dvlv.boxbuddyrs
           - Calibre: com.calibre_ebook.calibre
           - Fedora Media Writer: org.fedoraproject.MediaWriter
           - Gradience: com.github.GradienceTeam.Gradience