build(deps-dev): bump unbuild from 2.0.0 to 3.6.1

Bumps [unbuild](https://github.com/unjs/unbuild) from 2.0.0 to 3.6.1.
- [Release notes](https://github.com/unjs/unbuild/releases)
- [Changelog](https://github.com/unjs/unbuild/blob/main/CHANGELOG.md)
- [Commits](unjs/unbuild@v2.0.0...v3.6.1)

---
updated-dependencies:
- dependency-name: unbuild
  dependency-version: 3.6.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]