Fix some ansible-lint-reported warnings

This mostly fixes `key-order` warnings around
`block` statements.

roles/matrix-coturn/tasks/setup_install.yml

@@ -29,7 +29,8 @@
   delay: "{{ matrix_container_retries_delay }}"
   until: result is not failed
 
-- block:
+- when: "matrix_coturn_container_image_self_build | bool"
+  block:
     - name: Ensure Coturn repository is present on self-build
       ansible.builtin.git:
         repo: "{{ matrix_coturn_container_image_self_build_repo }}"
@@ -50,7 +51,6 @@
           dockerfile: "{{ matrix_coturn_container_image_self_build_repo_dockerfile_path }}"
           path: "{{ matrix_coturn_docker_src_files_path }}"
           pull: true
-  when: "matrix_coturn_container_image_self_build | bool"
 
 - name: Ensure Coturn configuration path exists
   ansible.builtin.file: