build warning

Author: BillWagner

docs/csharp/programming-guide/concepts/iterators.md

@@ -337,7 +337,7 @@ On each successive iteration of the `foreach` loop (or the direct call to `IEnum
 
 Iterators don't support the <xref:System.Collections.IEnumerator.Reset%2A?displayProperty=nameWithType> method. To reiterate from the start, you must obtain a new iterator. Calling <xref:System.Collections.IEnumerator.Reset%2A> on the iterator returned by an iterator method throws a <xref:System.NotSupportedException>.
 
-For additional information, see the [C# Language Specification](~/_csharpstandard/standard/classes.md#1515-iterators).
+For additional information, see the [C# Language Specification](~/_csharpstandard/standard/classes.md#1515-synchronous-and-asynchronous-iterators).
 
 ## Use of Iterators