Normalisation des dates/heures

tools/add_lego.js

@@ -417,7 +417,7 @@ async function main() {
     const coverLine = coverFile ? `cover: images/${coverFile}\n` : '';
     const md = `---\n` +
                `title: "${pageTitle.replace(/"/g, '\\"')}"\n` +
-               `date: ${createdAt}\n` +
+               `date: "${createdAt}"\n` +
                coverLine +
                `---\n\n` +
                body;