chore(deps): bump datasets from 4.1.1 to 4.8.4

Bumps [datasets](https://github.com/huggingface/datasets) from 4.1.1 to 4.8.4.
- [Release notes](https://github.com/huggingface/datasets/releases)
- [Commits](huggingface/datasets@4.1.1...4.8.4)

---
updated-dependencies:
- dependency-name: datasets
  dependency-version: 4.8.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -46,7 +46,7 @@ dependencies = [
     # Needed for tokenization and OSL reporting
     "transformers==4.57.1",
     "numpy==2.3.4",
-    "datasets==4.1.1",
+    "datasets==4.8.4",
     "Pillow==12.1.1",
     "sentencepiece==0.2.1",
     "protobuf==6.33.5",