How to define 'File' Schema Type in Swashbuckle.AspNetCore

After updating Swashbuckle.AspNetCore from v4.0.1 to v.6.5.0, the following code can't be compiled anymore:

public class FileSchemaType : IOperationFilter
{
	public void Apply(Operation operation, OperationFilterContext context)
	{
		// TODO Replace this workaround (https://github.com/domaindrivendev/Swashbuckle/issues/1144) with a proper solution using e. g. attributes
		if (operation.OperationId == "ExportToExcel" || operation.OperationId == "ExportToPdf" ||
			operation.OperationId == "GetReport" || operation.OperationId == "DownloadFile")
		{
			operation.Responses["200"].Schema = new Schema {Type = "file"};
		}
	}
}

I had to rewrite the mentioned code to this:

public void Apply(OpenApiOperation operation, OperationFilterContext context)
{
	// TODO Replace this workaround (https://github.com/domaindrivendev/Swashbuckle/issues/1144) with a proper solution using e. g. attributes
	if (operation.OperationId == "ExportToExcel" || operation.OperationId == "ExportToPdf" ||
		operation.OperationId == "GetReport" || operation.OperationId == "DownloadFile")
	{
		operation.Responses["200"].Schema = new Schema { Type = "file" };
	}
}

However, the property Schema doesn't exist anymore on operation.Responses["200"]

According to the release notes in v5.0.0-rc3 a number of significant changes, including a transition to Swagger/OpenAPI v3, were made in Swashbuckle.AspNetCore.

Using [Produces(typeof(HttpResponseMessage))] and returning a File instance...

[Produces(typeof(HttpResponseMessage))]
public async Task<IActionResult> ExportToExcel(string listName, string language, [FromBody] List<int> personIds,
	DateTime startDate, DateTime endDate, List<int> notSelectedTimeTypeIds
)
{
	var stream = await AbsencePlanningProvider.Instance.ExportToExcel(User.GetSub(), language, listName, personIds,
		startDate, endDate, notSelectedTimeTypeIds);
	stream.Position = 0;
	return File(stream, "application/octet-stream");
}

...together with this operation filter solved the problem:

public class FileSchemaType : IOperationFilter
{
	public void Apply(OpenApiOperation operation, OperationFilterContext context)
	{
		// The listed operations must have the attribute [Produces(typeof(HttpResponseMessage))]
		// in addition to this operation filter
		if (operation.OperationId == "ExportToExcel" || operation.OperationId == "ExportToPdf" ||
			operation.OperationId == "GetReport" || operation.OperationId == "DownloadFile")
		{
			foreach (var item in operation.Responses["200"].Content)
				item.Value.Schema = new OpenApiSchema { Type = "file" };
		}
	}
}