build(deps): bump langchain from 0.2.14 to 0.2.15 in /backend

Bumps [langchain](https://github.com/langchain-ai/langchain) from 0.2.14 to 0.2.15.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](https://github.com/langchain-ai/langchain/compare/langchain==0.2.14...langchain==0.2.15)

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

Signed-off-by: dependabot[bot] <support@github.com>
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dependabot[bot] 2024-09-01 02:56:33 +00:00 committed by GitHub
parent bccc6e08cc
commit 7780640938
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@ -34,7 +34,7 @@ anthropic
google-generativeai==0.7.2
tiktoken
langchain==0.2.14
langchain==0.2.15
langchain-community==0.2.12
langchain-chroma==0.1.2