docs(ansible): drop lingering setup-dev-env.sh and universe.yaml refs

Follow-up on the role README sweep. Two prose references still pointed
at the deprecated entrypoints after the tag migration commit.

- artifacts: the intro line claimed models download as part of
  setup-dev-env.sh; point at the ansible-playbook + --tags artifacts
  invocation instead.
- ros2: the Manual Installation section linked universe.yaml as the
  canonical rosdistro source; point at install_dev_env.yaml which now
  owns that variable.

Signed-off-by: Mete Fatih Cırıt <mfc@autoware.org>

Author: xmfcx

ansible/roles/artifacts/README.md

@@ -1,6 +1,6 @@
 # Autoware artifacts
 
-The Autoware perception stack uses models for inference. These models are automatically downloaded as part of the `setup-dev-env.sh` script.
+The Autoware perception stack uses models for inference. These models are downloaded by running `ansible-playbook autoware.dev_env.install_dev_env --tags artifacts`.
 
 The models are hosted by Web.Auto.
 

ansible/roles/ros2/README.md

@@ -29,7 +29,7 @@ The `ros2_installation_type` variable can also be found in:
 [./defaults/main.yaml](./defaults/main.yaml)
 
 For Universe, the `rosdistro` variable can also be found in:
-[../../playbooks/universe.yaml](../../playbooks/universe.yaml)
+[../../playbooks/install_dev_env.yaml](../../playbooks/install_dev_env.yaml)
 
 ```bash
 # Choose your ROS distribution