You're probably looking for [this](https://web.archive.org/web/20190617075634/http://adherents.com:80/adh_sf.html). It's a wayback machine (`web.archive.org`) link (from 2019; thanks to @Nzall), as suggested by @lucasbachmann. (The earliest working snapshot is from August 2000.)

1. google search: https://www.google.com/search?q=%22science+fiction+authors%22+%22religious+affiliations%22
2. finds this page: https://authorbib.weebly.com/science-fiction-authors.html
3. which lists this page: http://www.adherents.com/adh_sf.html
4. which is now occupied by an ad for payday lenders
5. go to https://archive.org/web/
6. paste the URL (`http://www.adherents.com/adh_sf.html`) in the search bar
7. lots of snapshots are available: the most recent ones are 301 errors or otherwise not useful. 

FWIW, if you're thinking about resurrecting this list, [this site](https://opuszine.us/posts/finding-fear-of-the-lord-lois-mcmaster-bujold-stories) states that Lois McMaster Bujold "describes herself as agnostic" (she has a ? in the posted list).