chore(deps): bump the npm_and_yarn group across 1 directory with 2 updates

Bumps the npm_and_yarn group with 2 updates in the /cloudflare-worker directory: [postcss](https://github.com/postcss/postcss) and [undici](https://github.com/nodejs/undici).


Updates `postcss` from 8.5.6 to 8.5.13
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.6...8.5.13)

Updates `undici` from 7.18.2 to 7.24.8
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v7.18.2...v7.24.8)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.13
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: undici
  dependency-version: 7.24.8
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

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

Author: dependabot[bot]