Update torchmetrics requirement

Updates the requirements on [torchmetrics](https://github.com/Lightning-AI/torchmetrics) to permit the latest version.
- [Release notes](https://github.com/Lightning-AI/torchmetrics/releases)
- [Changelog](https://github.com/Lightning-AI/torchmetrics/blob/master/CHANGELOG.md)
- [Commits](Lightning-AI/torchmetrics@v1.4.0.post0...v1.6.0)

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

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

setup.py

@@ -78,7 +78,7 @@ def package_files(prefix: str, directory: str, extension: str):
 install_requires = [
     'pyyaml>=6.0,<7',
     'tqdm>=4.62.3,<5',
-    'torchmetrics>=1.4.0.post0,<1.4.1',
+    'torchmetrics>=1.4.0.post0,<1.6.1',
     'torch_optimizer>=0.3.0,<0.4',
     'torchvision>=0.13.1,<0.18.2',
     'torch>=2.1.2,<2.3.2',