chore(deps): Bump langchain-community

Bumps [langchain-community](https://github.com/langchain-ai/langchain) from 0.2.12 to 0.2.15.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-community==0.2.12...langchain-community==0.2.15)

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

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

examples/langchain/langchainpy-localai-example/requirements.txt

@@ -11,7 +11,7 @@ frozenlist==1.4.1
 greenlet==3.0.3
 idna==3.8
 langchain==0.2.14
-langchain-community==0.2.12
+langchain-community==0.2.15
 marshmallow==3.22.0
 marshmallow-enum==1.5.1
 multidict==6.0.5