curl --request PATCH \
  --url https://gogs.example.com/api/v1/repos/{owner}/{repo}/issues/{index} \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "title": "<string>",
  "body": "<string>",
  "assignee": "<string>",
  "milestone": 123
}
'

{
  "id": 123,
  "number": 123,
  "title": "<string>",
  "body": "<string>",
  "user": {
    "id": 123,
    "username": "<string>",
    "login": "<string>",
    "full_name": "<string>",
    "email": "jsmith@example.com",
    "avatar_url": "<string>"
  },
  "labels": [
    {
      "id": 123,
      "name": "<string>",
      "color": "<string>",
      "url": "<string>"
    }
  ],
  "assignee": {
    "id": 123,
    "username": "<string>",
    "login": "<string>",
    "full_name": "<string>",
    "email": "jsmith@example.com",
    "avatar_url": "<string>"
  },
  "milestone": {
    "id": 123,
    "title": "<string>",
    "description": "<string>",
    "open_issues": 123,
    "closed_issues": 123,
    "closed_at": "2023-11-07T05:31:56Z",
    "due_on": "2023-11-07T05:31:56Z"
  },
  "comments": 123,
  "pull_request": {},
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z"
}