Skeleton horses, zombie horses and camel husks are not under the "Monster" family type in the code

Skeleton horses, zombie horses and camel husks are not under the monster family type in the game code, despite all other undead mobs including zombie nautiluses being.

Steps to reproduce the issue:

• Check the game code, see their family type:

  },
      "minecraft:type_family": {
        "family": [ "zombiehorse", "undead", "mob" ]
      },

Expected result:

• They should have monster in it.

  },
      "minecraft:type_family": {
        "family": [ "zombiehorse", "undead", "mob", "monster" ]
      },

Actual result:

• They don’t have it.