chore(deps): Bump weaviate-client from 4.6.7 to 4.8.1 in /examples/chainlit (#3568)

chore(deps): Bump weaviate-client in /examples/chainlit

Bumps [weaviate-client](https://github.com/weaviate/weaviate-python-client) from 4.6.7 to 4.8.1.
- [Release notes](https://github.com/weaviate/weaviate-python-client/releases)
- [Changelog](https://github.com/weaviate/weaviate-python-client/blob/main/docs/changelog.rst)
- [Commits](https://github.com/weaviate/weaviate-python-client/compare/v4.6.7...v4.8.1)

---
updated-dependencies:
- dependency-name: weaviate-client
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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