Make http_bind_port singular, do not allow multiple values

roles/matrix-bot-maubot/templates/systemd/matrix-bot-maubot.service.j2

@@ -26,9 +26,7 @@ ExecStart={{ matrix_host_command_docker }} run --rm --name matrix-bot-maubot \
 			{{ arg }} \
 			{% endfor %}
 			--network={{ matrix_docker_network }} \
-            {% for port in matrix_bot_maubot_management_interface_http_bind_port %}
-            -p {{ port }} \
-            {% endfor %}
+            -p {{ matrix_bot_maubot_management_interface_http_bind_port }} \
 			{{ matrix_bot_maubot_docker_image }} \
  			python3 -m maubot -c /data/config.yaml