Fix variable name typo

roles/matrix-nginx-proxy/tasks/ssl/setup_ssl_lets_encrypt_obtain_for_domain.yml

@@ -21,7 +21,7 @@
 
   - name: Wait some time, so that the required service for obtaining can start
     wait_for:
-      timeout: "{{ matrix_ssl_service_to_start_before_obtaining_start_wait_time_seconds }}"
+      timeout: "{{ matrix_ssl_pre_obtaining_required_service_start_wait_time_seconds }}"
     when: "matrix_ssl_pre_obtaining_required_service_start_result.changed|bool"
   when: "domain_name_needs_cert|bool and matrix_ssl_pre_obtaining_required_service_name != ''"