feat: デフォルト言語をjaへ変更

Author: staticWagomU

2025/astro.config.mjs

@@ -8,7 +8,7 @@ export default defineConfig({
     serializeConfig: true,
   },
   redirects: {
-    '/': '/2025/en',
-    '/2025': '/2025/en',
+    '/': '/2025/ja',
+    '/2025': '/2025/ja',
   },
 });