fix: upgrade @astrojs/starlight from 0.27.1 to 0.28.2

Snyk has created this PR to upgrade @astrojs/starlight from 0.27.1 to 0.28.2.

See this package in npm:
@astrojs/starlight

See this project in Snyk:
https://app.snyk.io/org/riderx/project/dc9c6cca-6d64-4015-bc41-b1431a3bfb95?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -17,7 +17,7 @@
   },
   "dependencies": {
     "@astrojs/sitemap": "^3.2.0",
-    "@astrojs/starlight": "^0.27.1",
+    "@astrojs/starlight": "^0.28.2",
     "@astrojs/vue": "^4.5.2",
     "@headlessui/vue": "^1.7.23",
     "@heroicons/vue": "^2.1.5",