Bump @astrojs/sitemap from 3.2.1 to 3.4.1 (#3219)

Bumps [@astrojs/sitemap](https://github.com/withastro/astro/tree/HEAD/packages/integrations/sitemap) from 3.2.1 to 3.4.1.
- [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/[email protected]/packages/integrations/sitemap)

---
updated-dependencies:
- dependency-name: "@astrojs/sitemap"
  dependency-version: 3.4.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

landing/package.json

@@ -14,7 +14,7 @@
     "@astrojs/check": "^0.9.4",
     "@astrojs/mdx": "^4.0.8",
     "@astrojs/rss": "^4.0.11",
-    "@astrojs/sitemap": "^3.2.1",
+    "@astrojs/sitemap": "^3.4.1",
     "@astrojs/tailwind": "^6.0.0",
     "@astrojs/vercel": "^8.2.0",
     "@polar-sh/sdk": "^0.20.2",