chore(deps): update astro monorepo

Author: renovate[bot]

package.json

@@ -17,14 +17,14 @@
   },
   "devDependencies": {
     "@astrojs/check": "^0.9.1",
-    "@astrojs/markdown-remark": "^5.3.0",
-    "@astrojs/mdx": "^3.1.8",
+    "@astrojs/markdown-remark": "^6.0.0",
+    "@astrojs/mdx": "^4.0.0",
     "@astrojs/sitemap": "^3.2.1",
     "@astrolib/seo": "1.0.0-beta.8",
     "@vitest/coverage-v8": "2.1.6",
     "any-ascii": "^0.3.2",
     "arg": "^5.0.2",
-    "astro": "^4.13.1",
+    "astro": "^5.0.0",
     "astro-i18n-aut": "^0.7.0",
     "astro-icon": "^1.1.1",
     "commander": "^12.1.0",