Bump langchain-community from 0.3.0 to 0.3.27 in /ai/python-rag-chatbot

Bumps [langchain-community](https://github.com/langchain-ai/langchain) from 0.3.0 to 0.3.27.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-community==0.3.0...langchain==0.3.27)

---
updated-dependencies:
- dependency-name: langchain-community
  dependency-version: 0.3.27
  dependency-type: direct:production
...

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

Author: dependabot[bot]

ai/python-rag-chatbot/requirements.txt

@@ -94,7 +94,7 @@ kubernetes==29.0.0
 langchain==0.3.7
 langchain-cli==0.0.24
 langchain-cohere==0.1.5
-langchain-community==0.3.0
+langchain-community==0.3.27
 langchain-core==0.2.2
 langchain-text-splitters==0.2.0
 langchainhub==0.1.13