Bump torch in /sagemaker-train/tests/data/train/script_mode (#5432)

Bumps [torch](https://github.com/pytorch/pytorch) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/pytorch/pytorch/releases)
- [Changelog](https://github.com/pytorch/pytorch/blob/main/RELEASE.md)
- [Commits](pytorch/pytorch@v2.7.0...v2.8.0)

---
updated-dependencies:
- dependency-name: torch
  dependency-version: 2.8.0
  dependency-type: direct:production
...

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Author: dependabot[bot]

sagemaker-train/tests/data/train/script_mode/requirements.txt

@@ -1,3 +1,3 @@
 numpy
 -f https://download.pytorch.org/whl/torch_stable.html
-torch==2.7.0
+torch==2.8.0