Fix a bad merge

These two PRs were green but broke when built together:

- https://github.com/dotnet/roslyn/pull/28652
- https://github.com/dotnet/roslyn/pull/28420

src/Compilers/CSharp/Test/Emit/Attributes/AttributeTests_WellKnownAttributes.cs

@@ -6891,7 +6891,7 @@ public class D : List<Y>
                 Diagnostic(ErrorCode.ERR_DeprecatedSymbolStr, "X").WithArguments("N.A", "Do not use").WithLocation(15, 16));
         }
 
-        [ConditionalFact(typeof(IsEnglishLocal), Skip = "https://github.com/dotnet/roslyn/issues/28328")]
+        [ConditionalFact(typeof(IsEnglishLocal), Reason = "https://github.com/dotnet/roslyn/issues/28328")]
         [WorkItem(580832, "http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/580832")]
         public void ObsoleteOnVirtual_OnBase()
         {