Fix error with folia scheduler since paper update

folia/src/main/java/net/islandearth/rpgregions/folia/schedule/FoliaScheduler.java

@@ -55,6 +55,11 @@ public class FoliaScheduler extends PlatformScheduler<IRPGRegionsAPI> implements
 
     @Override
     public RPGRegionsTask executeRepeating(Runnable runnable, long delay, long period) {
+        // Folia scheduler does not allow this for some reason.
+        if (delay == 0) {
+            delay = 1;
+        }
+
         final ScheduledTask task = Bukkit.getGlobalRegionScheduler().runAtFixedRate((Plugin) api, (s) -> runnable.run(), delay, period);
         return task::cancel;
     }