fix write token for paint shading #325

src/UglyToad.PdfPig/Graphics/Operations/PaintShading.cs

@@ -42,7 +42,7 @@
         /// <inheritdoc />
         public void Write(Stream stream)
         {
-            stream.WriteText($"/{Name}");
+            stream.WriteText($"/{Name.Data}");
             stream.WriteWhiteSpace();
             stream.WriteText(Symbol);
             stream.WriteNewLine();