[spring/spring-boot] requestBodies can accept object schemas if they are inline

api.yaml

openapi: 3.0.1
info:
  title: Example API
  version: '1.0'
paths:
  /test:
    post:
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                property:
                  type: string
      responses:
        '201':
          description: ok

Specification created for openapi-generator #10435 which shows that requestBodies can have an object schema, so long as the requestBody is defined inline.