fix(deps): update astro

Author: github-actions[bot]

package.json

@@ -38,8 +38,8 @@
     "@types/react": "19.1.8",
     "@types/react-dom": "19.1.6",
     "animejs": "4.0.2",
-    "astro": "5.15.6",
-    "astro-navbar": "2.3.7",
+    "astro": "5.15.8",
+    "astro-navbar": "2.4.0",
     "autoprefixer": "10.4.14",
     "clsx": "2.1.1",
     "date-fns": "4.1.0",