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](weaviate/weaviate-python-client@v4.6.7...v4.8.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

examples/chainlit/requirements.txt

@@ -1,6 +1,6 @@
 llama_index==0.11.7
 requests==2.32.3
-weaviate_client==4.6.7
+weaviate_client==4.8.1
 transformers
 torch
 chainlit