build(deps): bump github.com/dexidp/dex/api/v2 in /examples

Bumps [github.com/dexidp/dex/api/v2](https://github.com/dexidp/dex) from 2.1.0 to 2.2.0.
- [Release notes](https://github.com/dexidp/dex/releases)
- [Commits](https://github.com/dexidp/dex/compare/v2.1.0...v2.2.0

)

---
updated-dependencies:
- dependency-name: github.com/dexidp/dex/api/v2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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