build(deps): bump github.com/getkin/kin-openapi from 0.67.0 to 0.68.0

build(deps): bump github.com/getkin/kin-openapi from 0.67.0 to 0.68.0

Bumps [github.com/getkin/kin-openapi](https://github.com/getkin/kin-openapi) from 0.67.0 to 0.68.0.
- [Release notes](https://github.com/getkin/kin-openapi/releases)
- [Commits](https://github.com/getkin/kin-openapi/compare/v0.67.0...v0.68.0)

---
updated-dependencies:
- dependency-name: github.com/getkin/kin-openapi
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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