Bump couchbase from 4.2.1 to 4.3.0 (#61)

Bumps [couchbase](https://github.com/couchbase/couchbase-python-client) from 4.2.1 to 4.3.0.
- [Commits](couchbase/couchbase-python-client@4.2.1...4.3.0)

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

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

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
-couchbase==4.2.1
+couchbase==4.3.0
 fastapi==0.111.0
 httpx==0.27.0
 pydantic==2.7.3