Bump @eslint/plugin-kit from 0.3.3 to 0.3.4 in /specification

Bumps [@eslint/plugin-kit](https://github.com/eslint/rewrite/tree/HEAD/packages/plugin-kit) from 0.3.3 to 0.3.4.
- [Release notes](https://github.com/eslint/rewrite/releases)
- [Changelog](https://github.com/eslint/rewrite/blob/main/packages/plugin-kit/CHANGELOG.md)
- [Commits](https://github.com/eslint/rewrite/commits/plugin-kit-v0.3.4/packages/plugin-kit)

---
updated-dependencies:
- dependency-name: "@eslint/plugin-kit"
  dependency-version: 0.3.4
  dependency-type: indirect
...

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

Author: dependabot[bot]