Bump torch from 2.2.1 to 2.8.0 in /tests

Bumps [torch](https://github.com/pytorch/pytorch) from 2.2.1 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@v2.2.1...v2.8.0)

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

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

Author: dependabot[bot]

tests/requirements.colab.2024.02.txt

@@ -31,6 +31,6 @@ seaborn == 0.13.1
 statsmodels == 0.14.0
 sympy == 1.12
 tensorflow == 2.15.0
-torch == 2.2.1
+torch == 2.8.0
 torchvision == 0.17.1
 xlwt

tests/requirements.colab.2025.02.txt

@@ -33,6 +33,6 @@ seaborn == 0.13.2
 statsmodels == 0.14.4
 sympy == 1.13.1
 tensorflow == 2.18.0
-torch == 2.5.1
+torch == 2.8.0
 torchvision == 0.20.1
 xlwt