Update docs link in certbot unsupported error
diff --git a/letsencrypt-auto-source/letsencrypt-auto b/letsencrypt-auto-source/letsencrypt-auto
index 32eab52cdaa..56d9c65cf2a 100755
--- a/letsencrypt-auto-source/letsencrypt-auto
+++ b/letsencrypt-auto-source/letsencrypt-auto
@@ -930,7 +930,7 @@ else
     error "Sorry, I don't know how to bootstrap Certbot on your operating system!"
     error
     error "You will need to install OS dependencies, configure virtualenv, and run pip install manually."
-    error "Please see https://letsencrypt.readthedocs.org/en/latest/contributing.html#prerequisites"
+    error "Please see https://certbot.eff.org/docs/contributing.html#prerequisites"
     error "for more info."
     exit 1
   }
diff --git a/letsencrypt-auto-source/letsencrypt-auto.template b/letsencrypt-auto-source/letsencrypt-auto.template
index da8fabfeaf0..acdfcdb41cc 100755
--- a/letsencrypt-auto-source/letsencrypt-auto.template
+++ b/letsencrypt-auto-source/letsencrypt-auto.template
@@ -452,7 +452,7 @@ else
     error "Sorry, I don't know how to bootstrap Certbot on your operating system!"
     error
     error "You will need to install OS dependencies, configure virtualenv, and run pip install manually."
-    error "Please see https://letsencrypt.readthedocs.org/en/latest/contributing.html#prerequisites"
+    error "Please see https://certbot.eff.org/docs/contributing.html#prerequisites"
     error "for more info."
     exit 1
   }

## Pull Request Checklist

- [ ] If the change being made is to a [distributed component](https://certbot.eff.org/docs/contributing.html#code-components-and-layout), edit the `master` section of `certbot/CHANGELOG.md` to include a description of the change being made.
- [ ] Include your name in `AUTHORS.md` if you like.

Minor change but it's been mentioned more than once so sending a PR.