build(deps-dev): Bump @csstools/css-tokenizer from 2.2.4 to 2.3.1 (#1866

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Bumps [@csstools/css-tokenizer](https://github.com/csstools/postcss-plugins/tree/HEAD/packages/css-tokenizer) from 2.2.4 to 2.3.1.
- [Changelog](https://github.com/csstools/postcss-plugins/blob/main/packages/css-tokenizer/CHANGELOG.md)
- [Commits](https://github.com/csstools/postcss-plugins/commits/HEAD/packages/css-tokenizer)

---
updated-dependencies:
- dependency-name: "@csstools/css-tokenizer"
  dependency-type: indirect
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>