Change url of /faq - but for nav pills as well

We are trying to change the url of our Introduction & Guidelines - FIC Forum to Introduction & Guidelines - FIC Forum.

All went well and good with changing the url as per the solution here:
Go to Admin → Customize → Text, type ‘faq’ in the search box and then update from ‘faq’ to ‘guidelines’.

…this gave us a Introduction & Guidelines - FIC Forum url that we can point to in our custom nav links but this is the issue:

  1. Go to https://forum.ic.org
  2. Click ‘About the forum’ - see this leads to the url Introduction & Guidelines - FIC Forum
  3. Now click on the green ‘Introduction & guidelines’ button
    4 Issue: See that this changes the url to Introduction & Guidelines - FIC Forum

How do we change the url for these nav pills?