Update OTP OpenRC service

[akkoma] / priv / es-mappings / user.json

{
  "properties": {
    "timestamp": {
      "type": "date",
      "index": true
    },
    "instance": {
      "type": "keyword"
    },
    "nickname": {
      "type": "text"
    },
    "bio": {
      "type": "text"
    }
  }
}