build(deps): bump github.com/go-zookeeper/zk from 1.0.3 to 1.0.4

Bumps [github.com/go-zookeeper/zk](https://github.com/go-zookeeper/zk) from 1.0.3 to 1.0.4.
- [Release notes](https://github.com/go-zookeeper/zk/releases)
- [Commits](https://github.com/go-zookeeper/zk/compare/v1.0.3...v1.0.4

)

---
updated-dependencies:
- dependency-name: github.com/go-zookeeper/zk
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>