Bump langchain-couchbase from 0.2.4 to 0.3.0 (#57)

Bumps [langchain-couchbase](https://github.com/Couchbase-Ecosystem/langchain-couchbase) from 0.2.4 to 0.3.0.
- [Release notes](https://github.com/Couchbase-Ecosystem/langchain-couchbase/releases)
- [Commits](Couchbase-Ecosystem/langchain-couchbase@langchain-couchbase==0.2.4...langchain-couchbase==0.3.0)

---
updated-dependencies:
- dependency-name: langchain-couchbase
  dependency-version: 0.3.0
  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 @@
-langchain-couchbase==0.2.4
+langchain-couchbase==0.3.0
 langchain-openai==0.3.12
 pandas==2.2.3
 python-dotenv==1.1.0