title: Swashbuckle crashes by just adding another action method in controller
body: <p>I have just added another post method in a controller, and the Swagger Swashbuckle crashed.
  How to solve this ?</p>
  
  <pre><code> [HttpPost]
          public IActionResult CreateCars(List&lt;Car&gt; cars)
          {
              _carService.CreateCars(cars);
              return NoContent();
          }
  
  System.NotSupportedException: HTTP method "POST" &amp; path "api/Cars" overloaded by actions - IrkcnuApi.Controllers.CarsController.Create (WebApi),MyWebAPI.Controllers.CarsController.CreateCars (MyWebApi). Actions require unique method/path combination for OpenAPI 3.0. Use ConflictingActionsResolver as a workaround
     at Swashbuckle.AspNetCore.SwaggerGen.SwaggerGenerator.GenerateOperations(IEnumerable`1 apiDescriptions, SchemaRepository schemaRepository)
     at Swashbuckle.AspNetCore.SwaggerGen.SwaggerGenerator.GeneratePaths(IEnumerable`1 apiDescriptions, SchemaRepository schemaRepository)
     at Swashbuckle.AspNetCore.SwaggerGen.SwaggerGenerator.GetSwagger(String documentName, String host, String basePath)
     at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
     at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
  </code></pre>