Simple Guide has a broken link to Simple User

[john-e-riordan]

Describe the bug
https://sipjs.com/guides/simple/ has a link in "You should consider upgrading to the Simple User on the latest SIP.js Version." but the link 404's. It is currently https://sipjs.com/simple-user

Logs
Please include a gist or attached file with full logs. If this is not included, the first response will likely be requesting them.

To Reproduce (if possible)
Steps to reproduce the behavior:

Go to 'https://sipjs.com/guides/simple/'
Click on 'Simple User' within the Disclaimer section
See 404 error
Expected behavior
the correct (unknown so far) Simple User guide

Observed behavior
404 error.

Environment Information

Additional context

I expect the correct link is: https://sipjs.com/guides/simple-user/