refactor(update-backend): clean up script by removing unnecessary newline

- Removed an extra newline in the update-backend.sh script to improve readability and maintainability.

update-backend.sh

@@ -48,7 +48,6 @@ if [ -f "$BACKEND_DIR/.env" ]; then
 else
     echo "⚠ WARNUNG: Keine .env-Datei in $BACKEND_DIR gefunden!"
 fi
-
 echo "Setting permissions..."
 sudo -n chown -R yourpart:yourpart "$BACKEND_DIR"
 sudo -n chmod -R 755 "$BACKEND_DIR"