chore(deps): Bump langchain from 0.2.7 to 0.2.8 in /examples/langchai…

…n-chroma (mudler#2872)

chore(deps): Bump langchain in /examples/langchain-chroma

Bumps [langchain](https://github.com/langchain-ai/langchain) from 0.2.7 to 0.2.8.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain==0.2.7...langchain==0.2.8)

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

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

examples/langchain-chroma/requirements.txt

@@ -1,4 +1,4 @@
-langchain==0.2.7
+langchain==0.2.8
 openai==1.35.13
 chromadb==0.5.4
 llama-index==0.10.55