Update a report map

curl --request PATCH \
  --url https://app.gomangrove.com/api/v1/projects/{project_id}/report_maps/{id} \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "report_map": {
    "external_reference": "<string>",
    "quantification_methodology": "<string>",
    "external_reference_metadata": {}
  }
}
'

{
  "id": "rmp_abc123def456",
  "project_id": "prj_xyz789",
  "external_reference": "updated-ref",
  "external_reference_metadata": {},
  "quantification_methodology": {
    "name": "Biomass Geological Storage"
  },
  "created_at": "2026-01-15T10:00:00.000Z",
  "updated_at": "2026-01-15T11:00:00.000Z"
}