Update torch requirement from <2.3,>=1.13 to >=1.13,<2.6 in /tests

Updates the requirements on [torch](https://github.com/pytorch/pytorch) to permit the latest version.
- [Release notes](https://github.com/pytorch/pytorch/releases)
- [Changelog](https://github.com/pytorch/pytorch/blob/main/RELEASE.md)
- [Commits](pytorch/pytorch@v1.13.0...v2.5.0)

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

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

tests/constraints.txt

@@ -26,4 +26,4 @@ pytest-html==4.1.1
 pytest-timeout==2.2.0
 jax<=0.4.14
 jaxlib<=0.4.14
-torch>=1.13,<2.3
+torch>=1.13,<2.6