WN 10p4: OpenAPI.NET update to Preview 17 (#35464)

* WN 10p4: OpenAPI.NET update to Preview 17

* Update Prev17 link

Author: wadepickett

aspnetcore/release-notes/aspnetcore-10.0.md

@@ -61,6 +61,8 @@ This section describes new features for OpenAPI.
 
 [!INCLUDE[](~/release-notes/aspnetcore-10/includes/OpenApiSchemasInTransformers.md)]
 
+[!INCLUDE[](~/release-notes/aspnetcore-10/includes/OpenApiNetUpdatePrev17.md)]
+
 ### Authentication and authorization
 
 This section describes new features for authentication and authorization.

aspnetcore/release-notes/aspnetcore-10/includes/OpenApiNetUpdatePrev17.md

@@ -0,0 +1,6 @@
+### OpenAPI.NET updated to Preview.17
+
+The OpenAPI.NET library used in ASP.NET Core OpenAPI document generation was upgraded to [v2.0.0-preview17](https://www.nuget.org/packages/Microsoft.OpenApi/2.0.0-preview.17). This version includes a number of bug fixes and improvements and also introduces some breaking changes. The breaking changes should only affect users that use document, operation, or schema transformers. Breaking changes in this iteration that may affect developers include the following:
+
+* [Ephemeral object properties are now in Metadata](https://github.com/microsoft/OpenAPI.NET/blob/main/docs/upgrade-guide-2.md#ephemeral-object-properties-are-now-in-metadata)
+* [Use HTTP Method Object Instead of Enum](https://github.com/microsoft/OpenAPI.NET/blob/main/docs/upgrade-guide-2.md#use-http-method-object-instead-of-enum)