Bump torch from 1.5.1 to 2.6.0 in /src/model_converters/mmdnn_converter

Bumps [torch](https://github.com/pytorch/pytorch) from 1.5.1 to 2.6.0.
- [Release notes](https://github.com/pytorch/pytorch/releases)
- [Changelog](https://github.com/pytorch/pytorch/blob/main/RELEASE.md)
- [Commits](pytorch/pytorch@v1.5.1...v2.6.0)

---
updated-dependencies:
- dependency-name: torch
  dependency-version: 2.6.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

src/model_converters/mmdnn_converter/requirements.txt

@@ -10,7 +10,7 @@ tensorflow==1.15.2
 keras==2.2.4
 coremltools==2.1.0
 h5py==2.7.1
-torch==1.5.1
+torch==2.6.0
 torchvision==0.2.1
 onnx==1.4.1
 onnx-tf==1.2.1