[Schema Inaccuracy] Bad usage of `anyOf` to require either or of certain properties in definitions

[wolfy1339]

Schema Inaccuracy

The schema is trying to use anyOf and the required property to mark that it is expected that either one property or another is present

Example endpoint definition showing the issue:

PATCH /gists/{gist_id}

"gists/update": {
   [ ... ]
    requestBody: {
      content: {
        "application/json":
          | ({
              [ ... ]
              files?: {
                [key: string]:
                  | (
                      | ({
                          /** @description The new content of the file. */
                          content?: string;
                          /** @description The new filename for the file. */
                          filename?: string | null;
                        } & (
                          | Record<string, never>
                          | Record<string, never>
                          | Record<string, never>
                        ))
                      | null
                    )
                  | undefined;
              };
            } & (Record<string, never> | Record<string, never>))
          | null;
      };
    };
  };

"/gists/{gist_id}": {
[ ... ]
"patch": {
       [ ... ]
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "properties": {
                   [ ... ]
                  "files": {
                    [ ... ]
                    "type": "object",
                    "additionalProperties": {
                      "type": "object",
                      "nullable": true,
                      "properties": {
                        "content": {
                          "description": "The new content of the file.",
                          "type": "string"
                        },
                        "filename": {
                          "description": "The new filename for the file.",
                          "type": "string",
                          "nullable": true
                        }
                      },
                      "anyOf": [
                        {
                          "required": [
                            "content"
                          ]
                        },
                        {
                          "required": [
                            "filename"
                          ]
                        },
                        {
                          "type": "object",
                          "maxProperties": 0
                        }
                      ]
                    }
                  }
                },
                "anyOf": [
                  {
                    "required": [
                      "description"
                    ]
                  },
                  {
                    "required": [
                      "files"
                    ]
                  }
                ],
                "type": "object",
                "nullable": true
              },
            [ ... ]
              }
            }
          }
        },
  [ ... ]
      },

Expected

For those anyOf not to exist.
Instead, there should be 2 definitions wrapped in a oneOf each with one of the properties that is expected at a time.

Reproduction Steps

N/A

See octokit/types.ts#534