Fix ambiguous reference to terminal middleware (#34405)

Author: tdykstra

aspnetcore/fundamentals/middleware/index.md

@@ -262,7 +262,7 @@ The following table shows the requests and responses from `http://localhost:1234
 | `localhost:1234`              | `Hello from non-Map delegate.` |
 | `localhost:1234/?branch=main` | `Branch used = main`           |
 
-<xref:Microsoft.AspNetCore.Builder.UseWhenExtensions.UseWhen%2A> also branches the request pipeline based on the result of the given predicate. Unlike with `MapWhen`, this branch is rejoined to the main pipeline if it doesn't short-circuit or contain a terminal middleware:
+<xref:Microsoft.AspNetCore.Builder.UseWhenExtensions.UseWhen%2A> also branches the request pipeline based on the result of the given predicate. Unlike with `MapWhen`, this branch is rejoined to the main pipeline if it doesn't contain a terminal middleware:
 
 [!code-csharp[](~/fundamentals/middleware/index/snapshot/Chain60/ProgramUseWhen.cs?highlight=4-5)]