build(deps): bump undici and @astrojs/webapi

Bumps [undici](https://github.com/nodejs/undici) and [@astrojs/webapi](https://github.com/withastro/astro/tree/HEAD/packages/webapi). These dependencies needed to be updated together.

Updates `undici` from 5.22.0 to 5.26.3
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v5.22.0...v5.26.3)

Updates `@astrojs/webapi` from 2.1.0 to 2.2.0
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/@astrojs/webapi@2.2.0/packages/webapi/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/@astrojs/webapi@2.2.0/packages/webapi)

---
updated-dependencies:
- dependency-name: undici
  dependency-type: indirect
- dependency-name: "@astrojs/webapi"
  dependency-type: indirect
...

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