Added reference to PdfByteQRCode

Author: codebude

readme.md

@@ -73,6 +73,7 @@ Besides the normal QRCode class (which is shown in the example above) for creati
 * [AsciiQRCode<sup></sup>](https://github.com/codebude/QRCoder/wiki/Advanced-usage---QR-Code-renderers#22-asciiqrcode-renderer-in-detail)
 * [Base64QRCode<sup>*</sup>](https://github.com/codebude/QRCoder/wiki/Advanced-usage---QR-Code-renderers#23-base64qrcode-renderer-in-detail)
 * [BitmapByteQRCode<sup></sup>](https://github.com/codebude/QRCoder/wiki/Advanced-usage---QR-Code-renderers#24-bitmapbyteqrcode-renderer-in-detail)
+* [PdfByteQRCode<sup>*</sup>](https://github.com/codebude/QRCoder/wiki/Advanced-usage---QR-Code-renderers#210-pdfbyteqrcode-renderer-in-detail)
 * [PngByteQRCode<sup></sup>](https://github.com/codebude/QRCoder/wiki/Advanced-usage---QR-Code-renderers#25-pngbyteqrcode-renderer-in-detail)
 * [PostscriptQRCode<sup>*</sup>](https://github.com/codebude/QRCoder/wiki/Advanced-usage---QR-Code-renderers#29-postscriptqrcode-renderer-in-detail)
 * [SvgQRCode<sup>*</sup>](https://github.com/codebude/QRCoder/wiki/Advanced-usage---QR-Code-renderers#26-svgqrcode-renderer-in-detail)