chore(deps): bump pydantic-settings from 2.4.0 to 2.6.1

Bumps [pydantic-settings](https://github.com/pydantic/pydantic-settings) from 2.4.0 to 2.6.1.
- [Release notes](https://github.com/pydantic/pydantic-settings/releases)
- [Commits](pydantic/pydantic-settings@v2.4.0...v2.6.1)

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

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

requirements.txt

@@ -30,7 +30,7 @@ langchain-experimental
 pinecone-client==5.0.1
 pinecone-text==0.9.0
 pydantic==2.8.2
-pydantic-settings==2.4.0
+pydantic-settings==2.6.1
 python-dotenv==1.0.1
 pypdf==4.3.1
 tiktoken==0.8.0