Bump torch from 2.3.0 to 2.7.1 in /tripy/examples/nanogpt

Bumps [torch](https://github.com/pytorch/pytorch) from 2.3.0 to 2.7.1.
- [Release notes](https://github.com/pytorch/pytorch/releases)
- [Changelog](https://github.com/pytorch/pytorch/blob/main/RELEASE.md)
- [Commits](pytorch/pytorch@v2.3.0...v2.7.1)

---
updated-dependencies:
- dependency-name: torch
  dependency-version: 2.7.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

tripy/examples/nanogpt/requirements.txt

@@ -3,6 +3,6 @@ nvtripy
 transformers==4.48.0
 tiktoken==0.5.2
 --extra-index-url https://download.pytorch.org/whl/cu121
-torch==2.3.0
+torch==2.7.1
 nvidia-modelopt==0.11.1
 datasets==2.18.0