Bump torch from 2.6.0 to 2.7.1 in /pdf_ocr

Bumps [torch](https://github.com/pytorch/pytorch) from 2.6.0 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@v2.6.0...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]

pdf_ocr/requirements.txt

@@ -154,7 +154,7 @@ sympy==1.13.1
     # via torch
 temporalio==1.10.0
     # via restack-ai
-torch==2.6.0
+torch==2.7.1
     # via
     #   python-doctr
     #   torchvision