Relevent References in wiki is broken

[rgknox]

Describe the issue

The code of conduct points to a broken link in the wiki for relevant references:

https://github.com/NGEET/fates/wiki/Relevant-References

This is very important for attribution and collaboration. Once upon a time this page did list out a fairly comprehensive list of works related to FATES, hopefully we can find that page and re-link it.

[rgknox]

I was able to find the refences in the user's guide and fixed the broken link:

https://github.com/NGEET/fates/blob/main/CODE_OF_CONDUCT.md