docs: fix title

docs/how-to-create-a-complete-qr-bill.md

@@ -402,6 +402,6 @@ When you run the code above, SwissQRBill should generate a PDF file named `qr-bi
 [table]: ./pdf/index.md#table
 [pdfdocument]: http://pdfkit.org/docs/getting_started.html#creating_a_document
 [source code]: ../examples/how-to-create-a-complete-qr-bill/src/index.js
-[stackblitz]: https://stackblitz.com/fork/github/schoero/swissqrbill/tree/main/examples/how-to-create-a-complete-qr-bill?file=src%2Findex.js&title=How%20to%20create%20a%20complete%20bill&startScript=generate
+[stackblitz]: https://stackblitz.com/fork/github/schoero/swissqrbill/tree/main/examples/how-to-create-a-complete-qr-bill?file=src%2Findex.js&title=How%20to%20create%20a%20complete%20qr%20bill&startScript=generate
 [npm swissqrbill]: https://www.npmjs.com/package/swissqrbill
 [npm pdfkit]: https://www.npmjs.com/package/pdfkit