chore(astro): upgrade to astro 6 with legacy content compatibility

src/pages/glossaire/index.astro

@@ -5,11 +5,17 @@ import { getCollection } from "astro:content";
 const entries = await getCollection("glossaire");
 entries.sort((a, b) => a.data.term.localeCompare(b.data.term, "fr"));
 ---
+
 <SiteLayout title="Glossaire archicratique">
   <h1>Glossaire archicratique</h1>
   <ul>
     {entries.map((e) => (
-      <li><a href={`/glossaire/${e.slug}/`}>{e.data.term}</a> — <em>{e.data.definitionShort}</em></li>
+      <li>
+        <a href={`/glossaire/${String(e.id).replace(/\.(md|mdx)$/i, "")}/`}>
+          {e.data.term}
+        </a>{" "}
+        — <em>{e.data.definitionShort}</em>
+      </li>
     ))}
   </ul>
-</SiteLayout>
+</SiteLayout>