Fix PDF page orientation

Author: eXpl0it3r

Source/HtmlRenderer.PdfSharp/PdfGenerator.cs

@@ -173,6 +173,7 @@ public static void AddPdfPages(PdfDocument document, string html, PdfGenerateCon
                         var page = document.AddPage();
                         page.Height = XUnit.FromPoint(orgPageSize.Height);
                         page.Width = XUnit.FromPoint(orgPageSize.Width);
+                        page.Orientation = config.PageOrientation;
 
                         using (var g = XGraphics.FromPdfPage(page))
                         {