Bump torch in /mobile/examples/question_answering/android (#471)

Bumps [torch](https://github.com/pytorch/pytorch) from 1.13.1 to 2.2.0.
- [Release notes](https://github.com/pytorch/pytorch/releases)
- [Changelog](https://github.com/pytorch/pytorch/blob/main/RELEASE.md)
- [Commits](pytorch/pytorch@v1.13.1...v2.2.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Edward Chen <[email protected]>

Author: dependabot[bot]

mobile/examples/question_answering/android/prepare_model.requirements.txt

@@ -2,4 +2,4 @@ onnxruntime
 onnxruntime-extensions
 onnx
 transformers==4.38.0
-torch==1.13.1
+torch==2.2.0