chore(deps): bump @astrojs/sitemap in the minor-updates group (#631)

Bumps the minor-updates group with 1 update: [@astrojs/sitemap](https://github.com/withastro/astro/tree/HEAD/packages/integrations/sitemap).


Updates `@astrojs/sitemap` from 3.5.1 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/sitemap@3.6.0/packages/integrations/sitemap)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -18,7 +18,7 @@
   "dependencies": {
     "@astrojs/check": "^0.9.4",
     "@astrojs/rss": "^4.0.12",
-    "@astrojs/sitemap": "^3.5.1",
+    "@astrojs/sitemap": "^3.6.0",
     "@astrojs/svelte": "7.1.1",
     "@astrojs/tailwind": "^6.0.2",
     "@expressive-code/core": "^0.41.3",