chore(deps): bump langchain from 0.1.4 to 0.1.11 (#455)

Bumps [langchain](https://github.com/langchain-ai/langchain) from 0.1.4 to 0.1.11.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@v0.1.4...v0.1.11)

---
updated-dependencies:
- dependency-name: langchain
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -39,7 +39,7 @@ hyperframe==6.0.1
 idna==3.6
 jsonpatch==1.33
 jsonpointer==2.4
-langchain==0.1.4
+langchain==0.1.11
 langchain-community==0.0.16
 langchain-core==0.1.16
 langsmith==0.0.84