nix: update modules to refer to .org

Signed-off-by: oppiliappan <[e-mail]>

nix/modules/knot.nix

···
 
         appviewEndpoint = mkOption {
           type = types.str;
-          default = "https://tangled.sh";
+          default = "https://tangled.org";
           description = "Appview endpoint";
         };
 
···
 
           hostname = mkOption {
             type = types.str;
-            example = "knot.tangled.sh";
+            example = "my.knot.com";
             description = "Hostname for the server (required)";
           };
 

nix/modules/spindle.nix

···
 
           hostname = mkOption {
             type = types.str;
-            example = "spindle.tangled.sh";
+            example = "my.spindle.com";
             description = "Hostname for the server (required)";
           };
 
···
         pipelines = {
           nixery = mkOption {
             type = types.str;
-            default = "nixery.tangled.sh";
+            default = "nixery.tangled.sh"; # note: this is *not* on tangled.org yet
             description = "Nixery instance to use";
           };