Update dependency astro to v5.7.6

Author: renovate[bot]

package.json

@@ -38,7 +38,7 @@
     "@astrojs/vue": "5.0.11",
     "@tailwindcss/vite": "4.1.4",
     "@vueuse/core": "13.1.0",
-    "astro": "5.7.5",
+    "astro": "5.7.6",
     "astro-compressor": "1.0.0",
     "badgen": "3.2.3",
     "canvas-confetti": "1.9.3",