Update datasets requirement from <3 to <4

Updates the requirements on [datasets](https://github.com/huggingface/datasets) to permit the latest version.
- [Release notes](https://github.com/huggingface/datasets/releases)
- [Commits](huggingface/datasets@0.0.2...3.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -120,7 +120,7 @@ cloud = [
   "croud==1.12.0",
 ]
 datasets = [
-  "datasets<3",
+  "datasets<4",
   "kaggle<1.7",
 ]
 develop = [