chore(deps): bump langchain in /layers/langchain-common-deps (#302)

Bumps [langchain](https://github.com/langchain-ai/langchain) from 0.1.4 to 0.1.11.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@v0.1.4...v0.1.11)

---
updated-dependencies:
- dependency-name: langchain
  dependency-type: direct:production
...

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layers/langchain-common-deps/requirements.txt

@@ -2,6 +2,6 @@ boto3>=1.34.29
 botocore>=1.34.29
 requests==2.31.0
 requests-aws4auth==1.2.3
-langchain==0.1.4
+langchain==0.1.11
 opensearch-py==2.4.2
 openai==1.10.0