Bump ray from 2.46.0 to 2.51.1

Bumps [ray](https://github.com/ray-project/ray) from 2.46.0 to 2.51.1.
- [Release notes](https://github.com/ray-project/ray/releases)
- [Commits](ray-project/ray@ray-2.46.0...ray-2.51.1)

---
updated-dependencies:
- dependency-name: ray
  dependency-version: 2.51.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements-npu.txt

@@ -12,7 +12,7 @@ pybind11
 pylatexenc
 tensordict<=0.6.2
 transformers>=4.52.4
-ray==2.46.0
+ray==2.51.1
 wandb
 mathruler
 torchdata