Bump torch from 2.2.0 to 2.6.0 in /examples/flax/vision (#37618)

Bumps [torch](https://github.com/pytorch/pytorch) from 2.2.0 to 2.6.0.
- [Release notes](https://github.com/pytorch/pytorch/releases)
- [Changelog](https://github.com/pytorch/pytorch/blob/main/RELEASE.md)
- [Commits](https://github.com/pytorch/pytorch/compare/v2.2.0...v2.6.0)

---
updated-dependencies:
- dependency-name: torch
  dependency-version: 2.6.0
  dependency-type: direct:production
...

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examples/flax/vision/requirements.txt

@@ -3,6 +3,6 @@ jaxlib>=0.1.59
 flax>=0.3.5
 optax>=0.0.8
 -f https://download.pytorch.org/whl/torch_stable.html
-torch==2.2.0
+torch==2.6.0
 -f https://download.pytorch.org/whl/torch_stable.html
 torchvision==0.12.0+cpu