Simple Dungeon Spawner Fix

/setblock -85 73 5 minecraft:mob_spawner 0 replace {SpawnCount:2,SpawnRange:5,RequiredPlayerRange:50,MaxNearbyEntities:15,Delay:200,MinSpawnDelay:200,MaxSpawnDelay:300,SpawnData:{id:"Zombie",DeathLootTable:"minecraft:chests/simple_dungeon"},SpawnPotentials:[{Weight:5,Entity:{id:"Zombie",DeathLootTable:"minecraft:chests/simple_dungeon"}},{Weight:5,Entity:{id:"Creeper",DeathLootTable:"minecraft:chests/simple_dungeon"}},{Weight:5,Entity:{id:"Skeleton",DeathLootTable:"minecraft:chests/simple_dungeon"}}]}