Bump the app group with 1 update

Bumps the app group with 1 update: [langchain](https://github.com/langchain-ai/langchain).


Updates `langchain` from 0.0.352 to 0.0.353
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](https://github.com/langchain-ai/langchain/compare/v0.0.352...v0.0.353)

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

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

requirements.txt

@@ -4,7 +4,7 @@ black==23.12.1
 certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability
 duckduckgo-search==4.1.1
 faiss-cpu==1.7.4
-langchain==0.0.352
+langchain==0.0.353
 langsmith==0.0.75
 mypy==1.8.0
 numexpr==2.8.8