Fix typo, re #606

.gitlab/scripts/install_db.sh

@@ -17,7 +17,7 @@ if [ $(mysql -f -u $MYSQL_USER -h $MYSQL_HOST -p$MYSQL_PASSWORD $MYSQL_DATABASE
     if [ ! -z $DEMO_DATA ]; then
         echo "INSTALL DEMODATA"
         mysql -f -u $MYSQL_USER -h $MYSQL_HOST -p$MYSQL_PASSWORD $MYSQL_DATABASE < ./db/studip_demo_data.sql
-        mysql -f -u $MYSQL_USER -h $MYSQL_HOST -p$MYSQL_PASSWORD $MYSQL_DATABASE < ./db/studip_mvv_demo_data.sql.sql
+        mysql -f -u $MYSQL_USER -h $MYSQL_HOST -p$MYSQL_PASSWORD $MYSQL_DATABASE < ./db/studip_mvv_demo_data.sql
         mysql -f -u $MYSQL_USER -h $MYSQL_HOST -p$MYSQL_PASSWORD $MYSQL_DATABASE < ./db/studip_resources_demo_data.sql
     fi