Fix URL to arXiv

[bbjoverbeek]

Description

The URL was missing a digit, resulting in a link to an unrelated paper.

Related Issue

Type of Change

• 📚 Examples / docs / tutorials / dependencies update
• 🔧 Bug fix (non-breaking change which fixes an issue)

Checklist

• [x] I've read the CODE_OF_CONDUCT.md document.
• [x] I've read the CONTRIBUTING.md guide.
• [ ] I've successfully run the style checks using make fix-style.
• [ ] I've written tests for all new methods and classes that I created and successfully ran make test.
• [ ] I've written the docstring in Google format for all the methods and classes that I used.