Update unstructured requirement from <0.15 to <0.17 in /topic/machine-learning/llm-langchain (#680)

Update unstructured requirement in /topic/machine-learning/llm-langchain

Updates the requirements on [unstructured](https://github.com/Unstructured-IO/unstructured) to permit the latest version.
- [Release notes](https://github.com/Unstructured-IO/unstructured/releases)
- [Changelog](https://github.com/Unstructured-IO/unstructured/blob/main/CHANGELOG.md)
- [Commits](Unstructured-IO/unstructured@0.2.0...0.16.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Andreas Motl <andreas.motl@crate.io>

Author: dependabot[bot]

topic/machine-learning/llm-langchain/requirements.txt

@@ -12,7 +12,7 @@ requests<3
 requests-cache<2
 sqlalchemy==2.*
 sqlalchemy-cratedb==0.40.0
-unstructured<0.15
+unstructured<0.17
 
 # Development.
 # cratedb-toolkit @ git+https://github.com/crate-workbench/cratedb-toolkit.git@main