build(deps): bump nmstate from 2.2.17 to 2.2.18

Bumps [nmstate](https://github.com/nmstate/nmstate) from 2.2.17 to 2.2.18.
- [Release notes](https://github.com/nmstate/nmstate/releases)
- [Changelog](https://github.com/nmstate/nmstate/blob/base/CHANGELOG)
- [Commits](nmstate/nmstate@v2.2.17...v2.2.18)

---
updated-dependencies:
- dependency-name: nmstate
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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