Bump langchain in /community/fm-asr-streaming-rag/chain-server

Bumps [langchain](https://github.com/langchain-ai/langchain) from 0.2.6 to 0.3.30.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain==0.2.6...langchain==0.3.30)

---
updated-dependencies:
- dependency-name: langchain
  dependency-version: 0.3.30
  dependency-type: direct:production
...

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

Author: dependabot[bot]

community/fm-asr-streaming-rag/chain-server/requirements.txt

@@ -1,6 +1,6 @@
 fastapi==0.104.1
 uvicorn[standard]==0.24.0
 pymilvus==2.3.5
-langchain==0.2.6
+langchain==0.3.30
 langchain_core==0.2.25
 langchain_nvidia_ai_endpoints==0.2.0