Fix yamllint-reported errors

roles/custom/matrix-bridge-mautrix-telegram/tasks/validate_config.yml

@@ -39,4 +39,3 @@
     - {'old': 'matrix_telegram_lottieconverter_docker_repo_version', 'new': 'matrix_mautrix_telegram_lottieconverter_docker_repo_version'}
     - {'old': 'matrix_telegram_lottieconverter_docker_src_files_path', 'new': 'matrix_mautrix_telegram_lottieconverter_docker_src_files_path'}
     - {'old': 'matrix_telegram_lottieconverter_docker_image', 'new': 'matrix_mautrix_telegram_lottieconverter_docker_image'}
-