Temporary fix for datasets package version

[sudhu2k]

Description

Datatsets pip package v4.0.0 causes error while doing CI Tests. This is a temporary fix to limit to previous version of v4.0.0.

Fixes # (issue)
12896

Type of change

• Documentation change (change only to the documentation, either a fix or a new content)
• [x ] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Infra/Build change
• Code refactoring

Changes

Changed the requirements.txt for limiting the version for the datasets package under the following directories.
examples/jax/mnist
examples/jax/encoder

Checklist:

• [x ] I have read and followed the contributing guidelines
• [ x] The functionality is complete
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• [ x] My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• [ x] New and existing unit tests pass locally with my changes

[wangye805]

Let's merge after we see CI passing