Bump rollup-plugin-css-only from 4.5.4 to 4.5.5

Bumps [rollup-plugin-css-only](https://github.com/thgh/rollup-plugin-css-only) from 4.5.4 to 4.5.5.
- [Release notes](https://github.com/thgh/rollup-plugin-css-only/releases)
- [Changelog](https://github.com/thgh/rollup-plugin-css-only/blob/v4/CHANGELOG.md)
- [Commits](thgh/rollup-plugin-css-only@v4.5.4...v4.5.5)

---
updated-dependencies:
- dependency-name: rollup-plugin-css-only
  dependency-version: 4.5.5
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]