[Schema Inaccuracy] Pull Request Simple `labels.items.properties.description` may be `null`

[yanyongyu]

Schema Inaccuracy

The Pull Request Simple object field labels.items.properties.description may be null, as the Pull Request object.

schemas:
  # incorrect
  pull-request-simple:
    type: object
    title: Pull Request Simple
    properties:
      labels:
      type: array
      items:
        properties:
          description:
            type: string

  # correct
  pull-request:
    type: object
    title: Pull Request
    properties:
      labels:
      type: array
      items:
        properties:
          description:
            type:
            - string
            - 'null'

Expected

change the repo field to oneof repository / type: null

Reproduction Steps

list pull request using curl -X GET https://api.github.com/repos/apache/pulsar/pulls?state=open

Related to yanyongyu/githubkit#7