Chore(deps): Update weaviate-client requirement in /api/app (#112)

Updates the requirements on [weaviate-client](https://github.com/weaviate/weaviate-python-client) to permit the latest version.
- [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@v4.7.1...v4.9.0)

---
updated-dependencies:
- dependency-name: weaviate-client
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

api/app/requirements.txt

@@ -12,4 +12,4 @@ python-multipart~=0.0.16
 baize~=0.20.8
 alembic~=1.13.3
 face-recognition~=1.3.0
-weaviate-client~=4.7.1
+weaviate-client~=4.9.0