`link-checker` unexpectedly failing on `paciellogroup.com`

[howard-e]

Getting the following when running npm run link-checker:

failing output

Checked 127 source files
Checking 129 external pages...
Checking 88 of 129 external pages
Checked 129 of 129 external pages
Found broken external link on content/patterns/landmarks/examples/resources.html:56:33. Link is https://www.paciellogroup.com/blog/2013/02/using-wai-aria-landmarks-2013/, status is 403
Found broken external link on content/patterns/landmarks/examples/resources.html:57:33. Link is https://www.paciellogroup.com/blog/2015/01/basic-screen-reader-commands-for-accessibility-testing/, status is 403
Link checker found 2 broken links

The error fails with a 403 on the following urls:

• https://www.paciellogroup.com/blog/2013/02/using-wai-aria-landmarks-2013/
• https://www.paciellogroup.com/blog/2015/01/basic-screen-reader-commands-for-accessibility-testing/

Navigating to these pages from a browser loads the pages as expected

[howard-e]

Seems the user-agent string's was being blocked by Cloudflare. #3264 should address this.