Bump lightning from 2.2.5 to 2.3.2 in /requirements

Bumps [lightning](https://github.com/Lightning-AI/lightning) from 2.2.5 to 2.3.2.
- [Release notes](https://github.com/Lightning-AI/lightning/releases)
- [Commits](Lightning-AI/pytorch-lightning@2.2.5...2.3.2)

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

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

Author: dependabot[bot]

requirements/required.txt

@@ -10,7 +10,7 @@ lightly==1.4.25
 h5py==3.10.0
 geobench==1.0.0
 mlflow==2.14.3
-lightning==2.2.5
+lightning==2.3.2
 mmcv==2.0.0
 # Extra dependencies required by mmseg
 ftfy