Bump @genkit-ai/core from 0.5.0-rc.8 to 0.5.0

Bumps [@genkit-ai/core](https://github.com/firebase/genkit/tree/HEAD/js/core) from 0.5.0-rc.8 to 0.5.0.
- [Release notes](https://github.com/firebase/genkit/releases)
- [Commits](https://github.com/firebase/genkit/commits/0.5.0/js/core)

---
updated-dependencies:
- dependency-name: "@genkit-ai/core"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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