chore(deps): bump torch from 2.5.1+cxx11.abi to 2.7.1+cpu in /backend/python/diffusers in the pip group across 1 directory (#7549)

chore(deps): bump torch

Bumps the pip group with 1 update in the /backend/python/diffusers directory: torch.


Updates `torch` from 2.5.1+cxx11.abi to 2.7.1+cpu

---
updated-dependencies:
- dependency-name: torch
  dependency-version: 2.7.1+cpu
  dependency-type: direct:production
  dependency-group: pip
...

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