Bump couchbase from 4.3.5 to 4.4.0 (#137)

Bumps [couchbase](https://github.com/couchbase/couchbase-python-client) from 4.3.5 to 4.4.0.
- [Commits](couchbase/couchbase-python-client@4.3.5...4.4.0)

---
updated-dependencies:
- dependency-name: couchbase
  dependency-version: 4.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
-couchbase==4.3.5
+couchbase==4.4.0
 fastapi==0.115.12
 httpx==0.28.1
 pydantic==2.11.5