Upgrade Synapse (v1.72.0 -> v1.73.0)

Synapse Worker configuration updates are coming later.

roles/custom/matrix-synapse/defaults/main.yml

@@ -36,7 +36,7 @@ matrix_synapse_container_image_customizations_dockerfile_body_custom: ''
 
 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: v1.72.0
+matrix_synapse_version: v1.73.0
 matrix_synapse_docker_image_tag: "{{ matrix_synapse_version }}"
 matrix_synapse_docker_image_force_pull: "{{ matrix_synapse_docker_image.endswith(':latest') }}"