Fix typo.

Only affected the config option, not the flag, so not too surprised it wasn't noticed earlier.

https://github.com/EngineHub/WorldGuard/pull/2115/files/679b56948f41869bd545564a8c57562f157a6b66#r1878791900

Author: wizjany

worldguard-bukkit/src/main/java/com/sk89q/worldguard/bukkit/listener/WorldGuardEntityListener.java

@@ -603,7 +603,7 @@ public void onExplosionPrime(ExplosionPrimeEvent event) {
                 event.setCancelled(true);
                 return;
             }
-        } else if (event instanceof AbstractWindCharge) {
+        } else if (event.getEntity() instanceof AbstractWindCharge) {
             if (wcfg.blockWindChargeExplosions) {
                 event.setCancelled(true);
                 return;