Upgrade Synapse (v1.67.0 -> v1.68.0)

roles/matrix-synapse/defaults/main.yml

@@ -9,7 +9,7 @@ matrix_synapse_container_image_self_build_repo: "https://github.com/matrix-org/s
 
 matrix_synapse_docker_image: "{{ matrix_synapse_docker_image_name_prefix }}matrixdotorg/synapse:{{ matrix_synapse_docker_image_tag }}"
 matrix_synapse_docker_image_name_prefix: "{{ 'localhost/' if matrix_synapse_container_image_self_build else matrix_container_global_registry_prefix }}"
-matrix_synapse_version: v1.67.0
+matrix_synapse_version: v1.68.0
 matrix_synapse_docker_image_tag: "{{ matrix_synapse_version }}"
 matrix_synapse_docker_image_force_pull: "{{ matrix_synapse_docker_image.endswith(':latest') }}"