Bump torch in /pytorch_classification/train_multi_GPU

Bumps [torch](https://github.com/pytorch/pytorch) from 1.6.0 to 1.13.1.
- [Release notes](https://github.com/pytorch/pytorch/releases)
- [Changelog](https://github.com/pytorch/pytorch/blob/main/RELEASE.md)
- [Commits](pytorch/pytorch@v1.6.0...v1.13.1)

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

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

Author: dependabot[bot]

pytorch_classification/train_multi_GPU/requirements.txt

@@ -1,4 +1,4 @@
 matplotlib==3.2.1
 tqdm==4.42.1
 torchvision==0.7.0
-torch==1.6.0
+torch==1.13.1