chore(deps): bump langchain from 0.2.11 to 0.3.13

Bumps [langchain](https://github.com/langchain-ai/langchain) from 0.2.11 to 0.3.13.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain==0.2.11...langchain==0.3.13)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -24,7 +24,7 @@ langchainhub==0.1.21
 langchain-openai==0.1.25
 langchain-experimental
 openai>=1.40.0
-langchain==0.2.11
+langchain==0.3.13
 langchain-pinecone==0.1.3
 langchain-experimental
 pinecone-client==5.0.1