fix: set correct service unit for subapp_maintenance_end.timer to call

templates/usr/local/lib/systemd/system/subapp_maintenance_end.timer.j2

 [Unit]
-Description=timer for subapp_maintenance.service
+Description=timer for subapp.service
 
 [Timer]
 # run on the 1st Tuesday of each month
 # You can validate your calendar expressions using `systemd-analyze calendar EXPR`.
 OnCalendar=Tue *-*-01..07 08:00:00
-Unit=subapp_maintenance_begin
+Unit=subapp.service
 
 [Install]
 WantedBy=default.target