services/config/update23.yml

# update element in list: scalar -> map
foo: 2
bar: 4
array: [ 2, 3, 4 ]
map: { a: 5, b: 6, c: 7 }
list:
  - fish
  - { a: 5, b: 6, c: 7 }
  - [ 1, 2, 3 ]
  - { x: 8, y: 7, z: 6 }