Bump datasets from 4.6.1 to 4.8.5

Bumps [datasets](https://github.com/huggingface/datasets) from 4.6.1 to 4.8.5.
- [Release notes](https://github.com/huggingface/datasets/releases)
- [Commits](huggingface/datasets@4.6.1...4.8.5)

---
updated-dependencies:
- dependency-name: datasets
  dependency-version: 4.8.5
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

constraints.txt

@@ -22,7 +22,7 @@ pytest-xdist==3.8.0
 pytest-forked==1.6.0
 pytest-split==0.11.0
 
-datasets==4.6.1
+datasets==4.8.5
 matplotlib==3.10.9
 pandas==2.3.3
 fastprogress==1.0.5