Replaced DatabaseConversionTask scheduler

src/main/java/com/gmail/nossr50/runnables/database/DatabaseConversionTask.java

@@ -21,6 +21,6 @@ public class DatabaseConversionTask extends BukkitRunnable {
     public void run() {
         sourceDatabase.convertUsers(mcMMO.getDatabaseManager());
 
-        mcMMO.p.getServer().getScheduler().runTask(mcMMO.p, () -> sender.sendMessage(message));
+        mcMMO.p.getFoliaLib().getImpl().runNextTick(() -> sender.sendMessage(message));
     }
 }