build(deps): 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@v1.0.0...v1.8.0)

---
updated-dependencies:
- dependency-name: torchmetrics
  dependency-version: 1.8.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

course_UvA-DL/requirements.txt

@@ -1,6 +1,6 @@
 numpy <3.0 # needed for older Torch
 torch >=1.8.1,<2.8
-torchmetrics >=1.0,<1.8
+torchmetrics >=1.0,<1.9
 pytorch-lightning >=2.0,<2.6
 torchvision
 matplotlib

lightning_examples/requirements.txt

@@ -1,5 +1,5 @@
 numpy <3.0 # needed for older Torch
 torch>=1.8.1, <2.8
-torchmetrics>=1.0, <1.8
+torchmetrics>=1.0, <1.9
 pytorch-lightning >=2.0,<2.6
 matplotlib