Bump gocloud.dev from 0.22.0 to 0.23.0 (#307)

Bumps [gocloud.dev](https://github.com/google/go-cloud) from 0.22.0 to 0.23.0.
- [Release notes](https://github.com/google/go-cloud/releases)
- [Commits](https://github.com/google/go-cloud/compare/v0.22.0...v0.23.0

)

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