Bump @astrojs/sitemap from 3.2.1 to 3.4.0

Bumps [@astrojs/sitemap](https://github.com/withastro/astro/tree/HEAD/packages/integrations/sitemap) from 3.2.1 to 3.4.0.
- [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@3.4.0/packages/integrations/sitemap)

---
updated-dependencies:
- dependency-name: "@astrojs/sitemap"
  dependency-version: 3.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -18,7 +18,7 @@
     "@astrojs/mdx": "^4.1.0",
     "@astrojs/netlify": "^6.2.2",
     "@astrojs/rss": "^4.0.11",
-    "@astrojs/sitemap": "^3.2.1",
+    "@astrojs/sitemap": "^3.4.1",
     "@astrojs/svelte": "^7.1.0",
     "@codemirror/commands": "^6.8.0",
     "@codemirror/lang-json": "^6.0.1",