[MNT] [Dependabot](deps): Bump torchmetrics from 1.5.2 to 1.8.2

Bumps [torchmetrics](https://github.com/Lightning-AI/torchmetrics) from 1.5.2 to 1.8.2.
- [Release notes](https://github.com/Lightning-AI/torchmetrics/releases)
- [Changelog](https://github.com/Lightning-AI/torchmetrics/blob/master/CHANGELOG.md)
- [Commits](Lightning-AI/torchmetrics@v1.5.2...v1.8.2)

---
updated-dependencies:
- dependency-name: torchmetrics
  dependency-version: 1.8.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pyproject.toml

@@ -89,7 +89,7 @@ dependencies_2024 = [
     "pytorch-lightning==2.4.0",
     "scipy==1.14.1",
     "omegaconf==2.3.0",
-    "torchmetrics==1.5.2",
+    "torchmetrics==1.8.2",
     "einops==0.8.0",
 ]