Update minimal API prompt for .NET 9 OpenAPI document generation

prompts/aspnet-minimal-api-openapi.prompt.md

@@ -22,22 +22,21 @@ Your goal is to help me create well-structured ASP.NET Minimal API endpoints wit
 - Use record types for immutable request/response objects
 - Use meaningful property names that align with API design standards
 - Apply `[Required]` and other validation attributes to enforce constraints
+- Use the ProblemDetailsService and StatusCodePages to get standard error responses
 
 ## Type Handling
 
 - Use strongly-typed route parameters with explicit type binding
-- Apply proper parameter binding with `[FromBody]`, `[FromRoute]`, `[FromQuery]`
 - Use `Results<T1, T2>` to represent multiple response types
 - Return `TypedResults` instead of `Results` for strongly-typed responses
 - Leverage C# 10+ features like nullable annotations and init-only properties
 
-## OpenAPI / Swagger Documentation
+## OpenAPI Documentation
 
-- Add explicit OpenAPI operation details with `.WithOpenApi()`
+- Use the built-in OpenAPI document support added in .NET 9
 - Define operation summary and description
-- Document response types with `.Produces<T>(statusCode)`
-- Document request bodies with `.WithRequestBody()`
+- Add operationIds using the `WithName` extension method
+- Add descriptions to properties and parameters with `[Description()]`
 - Set proper content types for requests and responses
-- Include examples using `SwaggerRequestExampleAttribute`
-- Document authentication requirements with `.RequireAuthorization()`
-- Use XML documentation comments for descriptive API documentation
+- Use document transformers to add elements like servers, tags, and security schemes
+- Use schema transformers to apply customizations to OpenAPI schemas