Update astro monorepo to v5

Author: renovate[bot]

package.json

@@ -17,9 +17,9 @@
   "devDependencies": {
     "@astrojs/check": "~0.9.4",
     "@astrojs/language-server": "~2.16.0",
-    "@astrojs/mdx": "~4.3.0",
+    "@astrojs/mdx": "~5.0.0",
     "@astrojs/partytown": "^2.1.4",
-    "@astrojs/react": "^4.3.0",
+    "@astrojs/react": "^5.0.0",
     "@astrojs/tailwind": "~6.0.2",
     "@astrojs/ts-plugin": "~1.10.4",
     "@catppuccin/tailwindcss": "1.0.0",