With 'oneOf' the response schema contains an extra 'type: "string".

[dkwakkel]

Describe the bug

When using the annotation @apiresponse with a content and the a schema with 'oneOf', the schema of my response object contains an extra 'type: "string". Before 2.8.2 this was not the case.

Code:
@GetMapping("/test")
@ResponseStatus(HttpStatus.OK)
@operation(summary = "get", description = "Provides a response.")
@apiresponse(content = @content(mediaType = MediaTypes.HAL_JSON_VALUE,
schema = @io.swagger.v3.oas.annotations.media.Schema(oneOf = {
Integer.class
})),
responseCode = "200")
public Object get() {
return 1;
}

Result:

          "application/hal+json": {
            "schema": {
              "type": "string",
              "oneOf": [
                {
                  "type": "integer",
                  "format": "int32"
                }

To Reproduce
Steps to reproduce the behavior:

git clone https://github.com/dkwakkel/springdoc-wrong-type
Run the application (spring boot).
Run curl --location --request GET 'http://localhost:8080/api-docs' --header 'Content-Type: application/json'

The issue did not occur before v2.8.2, and it is still present in v2.8.11.

Expected behavior
The type should not be there:

          "application/hal+json": {
            "schema": {
              "oneOf": [
                {
                  "type": "integer",
                  "format": "int32"
                }