Fix instructions to backup limesurvey (Closes: #15467)

wiki/src/contribute/how/user_experience/limesurvey.mdwn

@@ -34,13 +34,13 @@ Updating LimeSurvey
 
        ssh 7vz7psas6zqqdszg.onion
 
-1. Login as `www-data`:
+1. Update the backup of the database in case things go wrong:
 
-       sudo -u www-data bash
+       sudo /usr/sbin/backupninja --now --debug --run /etc/backup.d/10.mysql
 
-1. Update the backup of the database in case things go wrong:
+1. Login as `www-data`:
 
-       /usr/sbin/backupninja --now --debug --run /etc/backup.d/10.mysql  
+       sudo -u www-data bash
 
 1. Fetch the changes from the *updates repo*: