fix(nextcloud_update.sh): fix script failing because nextcloud_occ_no_check is not set (#2799)

Signed-off-by: Simon L. <szaimen@e.mail.de>

Author: szaimen

nextcloud_update.sh

@@ -1237,9 +1237,9 @@ then
     fi
     if [ "${CURRENTVERSION%%.*}" -ge "22" ]
     then
-        if ! nextcloud_occ config:system:get maintenance_window_start
+        if [ -z "$(nextcloud_occ_no_check config:system:get maintenance_window_start)" ];
         then
-            nextcloud_occ config:system:set maintenance_window_start --type=integer --value=2
+            nextcloud_occ config:system:set maintenance_window_start --type=integer --value=100
         fi
     fi
     if [ "${CURRENTVERSION%%.*}" -ge "23" ]