Update `matrix_synapse_in_container_python_packages_path` for Synapse v1.141.0 (Python 3.12 -> 3.13)

Ref:
- https://github.com/element-hq/synapse/releases/tag/v1.141.0
- https://github.com/element-hq/synapse/pull/19064

> The Docker images are now based on Debian trixie and use Python 3.13.

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

@@ -365,7 +365,7 @@ matrix_synapse_goofys_systemd_required_services_list_custom: []
 # This can be set to 0 to remove the delay.
 matrix_synapse_systemd_service_post_start_delay_seconds: 10
 
-matrix_synapse_in_container_python_packages_path: "/usr/local/lib/python3.12/site-packages"
+matrix_synapse_in_container_python_packages_path: "/usr/local/lib/python3.13/site-packages"
 
 # Specifies which template files to use when configuring Synapse.
 # If you'd like to have your own different configuration, feel free to copy and paste