Bump github.com/apple/swift-openapi-runtime from 1.5.0 to 1.8.0

Bumps [github.com/apple/swift-openapi-runtime](https://github.com/apple/swift-openapi-runtime) from 1.5.0 to 1.8.0.
- [Release notes](https://github.com/apple/swift-openapi-runtime/releases)
- [Commits](apple/swift-openapi-runtime@1.5.0...1.8.0)

---
updated-dependencies:
- dependency-name: github.com/apple/swift-openapi-runtime
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]