chore(deps): bump langchain-community from 0.2.6 to 0.2.9 (#82)

Bumps [langchain-community](https://github.com/langchain-ai/langchain) from 0.2.6 to 0.2.9.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-community==0.2.6...langchain-community==0.2.9)

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

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Author: dependabot[bot]

requirements.txt

@@ -1,3 +1,3 @@
 langchain-core==0.2.24
-langchain-community==0.2.6
+langchain-community==0.2.9
 google-cloud-spanner==3.47.0