[Bug]: typo at "object" property in README

[M-casado]

At README.md, within the dev branch (AFAIK the latest one), I saw that the following block has object instead of data at the root level of the JSON file.

{
  "schema": {
    "$schema": "http://json-schema.org/draft-07/schema#",
    "type": "object",
    "properties": {
      "alias": {
        "description": "A sample unique identifier in a submission.",
        "type": "string"
      },
      "taxonId": {
        "description": "The taxonomy id for the sample species.",
        "type": "integer"
      },
      "taxon": {
        "description": "The taxonomy name for the sample species.",
        "type": "string"
      },
      "releaseDate": {
        "description": "Date from which this sample is released publicly.",
        "type": "string",
        "format": "date"
      }
    },  
    "required": ["alias", "taxonId" ]
  },
  "object": {
    "alias": "MA456",
    "taxonId": 9606
  }
}