Bump github.com/prometheus/client_golang from 0.9.2 to 0.9.4
Bump github.com/prometheus/client_golang from 0.9.2 to 0.9.4

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 0.9.2 to 0.9.4.
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/master/CHANGELOG.md)
- [Commits](https://github.com/prometheus/client_golang/compare/v0.9.2...v0.9.4)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
FairwindsOps/rbac-manager,FairwindsOps/rbac-manager