Updated download-pdf example for node to use new savePDF option

examples/node/download-pdf.js

@@ -12,10 +12,9 @@ console.log(`Recognizing ${image}`);
   const worker = await createWorker();
   await worker.loadLanguage('eng');
   await worker.initialize('eng');
-  const { data: { text } } = await worker.recognize(image);
+  const { data: { text, pdf } } = await worker.recognize(image, {savePDF: true});
   console.log(text);
-  const { data } = await worker.getPDF('Tesseract OCR Result');
-  fs.writeFileSync('tesseract-ocr-result.pdf', Buffer.from(data));
+  fs.writeFileSync('tesseract-ocr-result.pdf', Buffer.from(pdf));
   console.log('Generate PDF: tesseract-ocr-result.pdf');
   await worker.terminate();
 })();