[JXA] Insert the date.

InsertDate.js

function run(input, parameters) {
	const today = new Date();
	const delimiter = "."; //日付の区切り文字
	const y = today.getFullYear()-2000;
	const m = ("0"+(today.getMonth()+1)).slice(-2);
	const d = ("0"+today.getDate()).slice(-2);
	const output = `${[y,m,d].join(delimiter)}_`;
	return output;
}