Fix bug in NBTPredicateIngredient serializer (#4536)

Author: Mqrius

src/main/java/com/gregtechceu/gtceu/api/recipe/ingredient/NBTPredicateIngredient.java

@@ -96,7 +96,7 @@ public static class Serializer implements IIngredientSerializer<NBTPredicateIngr
 
         public void write(FriendlyByteBuf buffer, NBTPredicateIngredient ingredient) {
             buffer.writeItem(ingredient.stack);
-            buffer.writeUtf(ingredient.toJson().toString());
+            buffer.writeUtf(ingredient.predicate.toJson().toString());
         }
     }
 }