Bump lightning from 2.0.3 to 2.3.3

Bumps [lightning](https://github.com/Lightning-AI/lightning) from 2.0.3 to 2.3.3.
- [Release notes](https://github.com/Lightning-AI/lightning/releases)
- [Commits](Lightning-AI/pytorch-lightning@2.0.3...2.3.3)

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

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

Author: dependabot[bot]

requirements.txt

@@ -9,6 +9,6 @@ requests
 einops
 optuna
 seaborn
-lightning==2.0.3
+lightning==2.3.3
 bgflow @ git+https://github.com/RussellALA/bgflow.git
 nflows @ git+https://github.com/RussellALA/nflows.git