build(deps): bump @astrojs/sitemap from 3.5.0 to 3.6.0

Bumps [@astrojs/sitemap](https://github.com/withastro/astro/tree/HEAD/packages/integrations/sitemap) from 3.5.0 to 3.6.0.
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/integrations/sitemap/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/@astrojs/[email protected]/packages/integrations/sitemap)

---
updated-dependencies:
- dependency-name: "@astrojs/sitemap"
  dependency-version: 3.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -16,7 +16,7 @@
   "dependencies": {
     "@astrojs/react": "^4.3.0",
     "@astrojs/rss": "^4.0.12",
-    "@astrojs/sitemap": "^3.5.0",
+    "@astrojs/sitemap": "^3.6.0",
     "@giscus/react": "^3.1.0",
     "@resvg/resvg-js": "^2.6.2",
     "@tailwindcss/vite": "^4.1.12",