Bump @astrojs/sitemap from 3.1.6 to 3.2.1 in /uiuc.tf

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:production
  update-type: version-update:semver-minor
...

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

uiuc.tf/package.json

@@ -14,7 +14,7 @@
     "@astrojs/mdx": "^3.1.4",
     "@astrojs/netlify": "^5.5.1",
     "@astrojs/react": "^3.6.2",
-    "@astrojs/sitemap": "^3.1.6",
+    "@astrojs/sitemap": "^3.2.1",
     "@astrojs/tailwind": "^5.1.0",
     "astro": "^4.16.8",
     "rehype-katex": "^7.0.1",