build(deps-dev): bump the dev-dependencies group with 2 updates (#2373)

Bumps the dev-dependencies group with 2 updates: [rollup](https://github.com/rollup/rollup) and [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest).


Updates `rollup` from 4.25.0 to 4.26.0
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v4.25.0...v4.26.0)

Updates `vitest` from 2.1.4 to 2.1.5
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v2.1.5/packages/vitest)

---
updated-dependencies:
- dependency-name: rollup
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
- dependency-name: vitest
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
...

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

Author: dependabot[bot]