Add LineArrow name constant

During updating samples, it was found out that LineArrow name
isn't added as constant in PdfName class, though LineArrow name
is described in the specification as one of the valid values of the IT entry.

DEVSIX-3352

Autoported commit.
Original commit hash: [9d1c931fa]

Author: EvgenyB1001

itext/itext.kernel/itext/kernel/pdf/PdfName.cs

@@ -930,6 +930,8 @@ public class PdfName : PdfPrimitiveObject, IComparable<iText.Kernel.Pdf.PdfName>
 
         public static readonly iText.Kernel.Pdf.PdfName Line = CreateDirectName("Line");
 
+        public static readonly iText.Kernel.Pdf.PdfName LineArrow = CreateDirectName("LineArrow");
+
         public static readonly iText.Kernel.Pdf.PdfName LineHeight = CreateDirectName("LineHeight");
 
         public static readonly iText.Kernel.Pdf.PdfName LineNum = CreateDirectName("LineNum");

port-hash

@@ -1 +1 @@
-0ed2b5b17691ba4d0a567241f02d79124738843c
+9d1c931fa63bcf5441d9c6ff9f4d6e3b75876e20