Fix bad StyleCop warning

src/ImageSharp/Memory/TransformItemsDelegate{T}.cs → src/ImageSharp/Memory/TransformItemsDelegate{TSource, TTarget}.cs

@@ -1,9 +1,11 @@
-// Copyright (c) Six Labors.
+// Copyright (c) Six Labors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
 
 namespace SixLabors.ImageSharp.Memory
 {
+#pragma warning disable SA1649 // File name should match first type name
     internal delegate void TransformItemsDelegate<TSource, TTarget>(ReadOnlySpan<TSource> source, Span<TTarget> target);
+#pragma warning restore SA1649 // File name should match first type name
 }