Add missing usage of matrix_authentication_service_syn2mas_process_extra_arguments when constructing matrix_authentication_service_syn2mas_migration_command

roles/custom/matrix-authentication-service/tasks/syn2mas.yml

@@ -97,6 +97,7 @@
       --command=migrate
       --synapseConfigFile=/homeserver.yaml
       --masConfigFile=/mas-config.yaml
+      {{ matrix_authentication_service_syn2mas_process_extra_arguments | join(' ') }}
       {% if matrix_authentication_service_syn2mas_dry_run | bool %}--dryRun{% endif %}
   tags:
     - skip_ansible_lint