build(deps): bump torch from 1.8.1 to 1.13.1

Bumps [torch](https://github.com/pytorch/pytorch) from 1.8.1 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@v1.8.1...v1.13.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements-docs.txt

@@ -1,4 +1,4 @@
-torch==1.8.1
+torch==1.13.1
 torchvision==0.9.1
 sphinx==3.5.4
 visdom==0.1.8.8