好的，所以我有这个yaml文件，我想替换一个字符串

socialspy: true

与字符串

socialspy: false

但是我不知道该怎么办。这是完整的Yaml文件

timestamps:
  login: 1395784099618
  lastteleport: 1395785353975
  logout: 1395777644566
  mute: 0
ipAddress: 127.0.0.1
lastlocation:
  world: world
  x: -276.7695097103249
  y: 67.31022115326866
  z: -354.327229975015
  yaw: 127.892334
  pitch: 20.817677
money: '155200.0'
logoutlocation:
  world: world
  x: -252.00777100946556
  y: 76.56983022033046
  z: -348.45387330548886
  yaw: 319.99237
  pitch: 19.562881
socialspy: true
godmode: true
afk: false
powertools:
muted: false