So, I'm adding a custom controller in Umbraco 12, with the following code:

using Microsoft.AspNetCore.Mvc;

namespace MyPersonalBlog.Backend.Controllers
{
    /// <summary>
    /// This is an awesome controller
    /// </summary>
    [ApiController]
    [Route("[controller]")]
    public class ExampleController : ControllerBase
    {
        /// <summary>
        /// This is my summary for this request
        /// </summary>
        /// <returns>a string</returns>
        [HttpGet]
        [ProducesResponseType(StatusCodes.Status200OK)]
        [ProducesResponseType(StatusCodes.Status500InternalServerError)]

        public string ExampleRequest()
        {
            return "Blabla";
        }
    }
}

How can I get the summary in my swagger?