bump(deps): bump zod and @astrojs/sitemap in /web

Bumps [zod](https://github.com/colinhacks/zod) and [@astrojs/sitemap](https://github.com/withastro/astro/tree/HEAD/packages/integrations/sitemap). These dependencies needed to be updated together.

Updates `zod` from 3.21.1 to 3.22.4
- [Release notes](https://github.com/colinhacks/zod/releases)
- [Changelog](https://github.com/colinhacks/zod/blob/master/CHANGELOG.md)
- [Commits](colinhacks/zod@v3.21.1...v3.22.4)

Updates `@astrojs/sitemap` from 3.0.0 to 3.0.5
- [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@3.0.5/packages/integrations/sitemap)

---
updated-dependencies:
- dependency-name: zod
  dependency-type: indirect
- dependency-name: "@astrojs/sitemap"
  dependency-type: indirect
...

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

Author: dependabot[bot]