Make use of message in Debug.Assert

I assume the argument expression in `message` was originally meant to be used.

MoreLinq/Debug.cs

@@ -26,6 +26,6 @@ static class Debug
         [Conditional("DEBUG")]
         public static void Assert([DoesNotReturnIf(false)] bool condition,
                                   [CallerArgumentExpression(nameof(condition))] string? message = null) =>
-            System.Diagnostics.Debug.Assert(condition);
+            System.Diagnostics.Debug.Assert(condition, message);
     }
 }