Bump langchain in /apps/enterprise-knowledge-retrieval (#695)

Bumps [langchain](https://github.com/langchain-ai/langchain) from 0.0.158 to 0.0.246.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](https://github.com/langchain-ai/langchain/commits)

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

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apps/enterprise-knowledge-retrieval/requirements.txt

@@ -1,4 +1,4 @@
-langchain==0.0.158
+langchain==0.0.246
 numpy==1.24.2
 openai==0.27.4
 pandas==2.0.0