Update coturn (4.5.2-r4 -> 4.5.2-r8)

roles/matrix-coturn/defaults/main.yml

@@ -5,7 +5,7 @@ matrix_coturn_container_image_self_build_repo: "https://github.com/coturn/coturn
 matrix_coturn_container_image_self_build_repo_version: "docker/{{ matrix_coturn_version }}"
 matrix_coturn_container_image_self_build_repo_dockerfile_path: "docker/coturn/alpine/Dockerfile"
 
-matrix_coturn_version: 4.5.2-r4
+matrix_coturn_version: 4.5.2-r8
 matrix_coturn_docker_image: "{{ matrix_coturn_docker_image_name_prefix }}coturn/coturn:{{ matrix_coturn_version }}-alpine"
 matrix_coturn_docker_image_name_prefix: "{{ 'localhost/' if matrix_coturn_container_image_self_build else matrix_container_global_registry_prefix }}"
 matrix_coturn_docker_image_force_pull: "{{ matrix_coturn_docker_image.endswith(':latest') }}"