chore(deps): update docling-core[chunking] requirement

Updates the requirements on [docling-core[chunking]](https://github.com/docling-project/docling-core) to permit the latest version.
- [Release notes](https://github.com/docling-project/docling-core/releases)
- [Changelog](https://github.com/docling-project/docling-core/blob/main/CHANGELOG.md)
- [Commits](docling-project/docling-core@v2.74.1...v2.91.0)

---
updated-dependencies:
- dependency-name: docling-core[chunking]
  dependency-version: 2.89.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

lib/crewai/pyproject.toml

@@ -72,7 +72,7 @@ docling = [
     # docling 2.97 split into docling-slim; the chunker package (HierarchicalChunker)
     # now eagerly imports code-chunking submodules that need tree-sitter/semchunk,
     # which only the docling-core[chunking] extra provides.
-    "docling-core[chunking]>=2.74.1",
+    "docling-core[chunking]>=2.91.0",
 ]
 qdrant = [
     "qdrant-client[fastembed]~=1.14.3",