fix(deps): update dependency astro to v7 [security]

Author: renovate[bot]

package.json

@@ -20,7 +20,7 @@
     "@astrojs/cloudflare": "13.6.0",
     "@astrojs/starlight": "0.39.2",
     "@tailwindcss/vite": "4.3.0",
-    "astro": "6.3.8",
+    "astro": "7.1.0",
     "astro-mermaid": "2.0.1",
     "mermaid": "11.16.1",
     "sharp": "0.35.0",