Bump @astrojs/sitemap from 3.1.6 to 3.2.1

Bumps [@astrojs/sitemap](https://github.com/withastro/astro/tree/HEAD/packages/integrations/sitemap) from 3.1.6 to 3.2.1.
- [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@3.2.1/packages/integrations/sitemap)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -29,7 +29,7 @@
   },
   "devDependencies": {
     "@astrojs/react": "^3.6.2",
-    "@astrojs/sitemap": "^3.1.6",
+    "@astrojs/sitemap": "^3.2.1",
     "@astrojs/tailwind": "^5.1.0",
     "@tailwindcss/typography": "^0.5.15",
     "@types/github-slugger": "^1.3.0",