.NET10 openApi.md - missing space (#34806)

Author: hakenr

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

@@ -74,6 +74,6 @@ app.MapOpenApi("/openapi/{documentName}.yaml");
 Support for:
 
 - YAML is currently only available for the the OpenAPI served from the OpenAPI endpoint.
-- Generating OpenAPI documents in YAML format at build time isadded in a future preview.
+- Generating OpenAPI documents in YAML format at build time is added in a future preview.
 
 See [this PR](https://github.com/dotnet/aspnetcore/pull/58616) which added support for serving the generated OpenAPI document in YAML format.