Bump langchain-community from 0.3.14 to 0.3.15

Bumps [langchain-community](https://github.com/langchain-ai/langchain) from 0.3.14 to 0.3.15.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-community==0.3.14...langchain-community==0.3.15)

---
updated-dependencies:
- dependency-name: langchain-community
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -31,7 +31,7 @@ dependencies = [
   "jinja2==3.1.5",
   "langchain==0.3.14",
   "langchain-anthropic==0.3.3",
-  "langchain-community==0.3.14",
+  "langchain-community==0.3.15",
   "langchain-google-genai==2.0.9",
   "langchain-openai==0.3.1",
   "langchain-text-splitters==0.3.5",