Fix max nearby entities class check (#9967)

patches/server/Fix-a-bunch-of-vanilla-bugs.patch

@@ -66,6 +66,9 @@ https://bugs.mojang.com/browse/MC-174630
 https://bugs.mojang.com/browse/MC-153086
   Fix the beacon deactivation sound always playing when broken
 
+https://bugs.mojang.com/browse/MC-259321
+  Fix spawners checking max nearby entities with correct type
+
 == AT ==
 public net/minecraft/world/entity/Mob leashInfoTag
 
@@ -408,8 +411,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        return new net.minecraft.world.level.entity.EntityTypeTest<>() {
 +            @Nullable
 +            @Override
-+            public T tryCast(B clazz) {
-+                return (T)(clazz.equals(clazz.getClass()) ? clazz : null);
++            public T tryCast(B entity) {
++                return (T)(clazz.equals(entity.getClass()) ? entity : null);
 +            }
 +
 +            @Override