Bump langchain from 0.0.293 to 0.0.300

Bumps [langchain](https://github.com/langchain-ai/langchain) from 0.0.293 to 0.0.300.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](https://github.com/langchain-ai/langchain/compare/v0.0.293...v0.0.300)

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

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

requirements.txt

@@ -1,6 +1,6 @@
 anthropic==0.3.11
 faiss-cpu==1.7.4
-langchain==0.0.293
+langchain==0.0.300
 langsmith==0.0.38
 openai==0.28.0
 pypdf==3.16.1