docs(conduit): update link to config docs

nixos/modules/services/matrix/conduit.nix

@@ -102,7 +102,7 @@ in
         default = {};
         description = ''
             Generates the conduit.toml configuration file. Refer to
-            <https://gitlab.com/famedly/conduit/-/blob/master/conduit-example.toml>
+            <https://docs.conduit.rs/configuration.html>
             for details on supported values.
             Note that database_path can not be edited because the service's reliance on systemd StateDir.
         '';