Bump langchain-community from 0.3.21 to 0.3.27 in /src/client/mcp/rag (#326)

Bumps [langchain-community](https://github.com/langchain-ai/langchain) from 0.3.21 to 0.3.27.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-community==0.3.21...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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

src/client/mcp/rag/pyproject.toml

@@ -5,7 +5,7 @@ description = "Add your description here"
 readme = "README.md"
 requires-python = ">=3.11"
 dependencies = [
-    "langchain-community==0.3.21",
+    "langchain-community==0.3.27",
     "langchain-core==0.3.52",
     "langchain-huggingface==0.1.2",
     "langchain-ollama==0.3.2",