[ZM_U] [ASM] Short Doors

[FelixWright]

(p.k.a. 3 Block Tall Doors)

March 23 2024
━  updated topRowsTTB.bin
      ┗━ replaced vertical gray door with tiles hackers would actually use

━  updated shortDoors.asm
      ┣━ renamed file to zm_u_shortDoors.asm
      ┣━ renamed input rom from "zm.gba" to "zm_u.gba"
      ┗━ renamed output rom from "shortDoors.asm" to "zm_u_shortDoors.asm"