Bump lightning from 2.3.0 to 2.3.1

Bumps [lightning](https://github.com/Lightning-AI/lightning) from 2.3.0 to 2.3.1.
- [Release notes](https://github.com/Lightning-AI/lightning/releases)
- [Commits](Lightning-AI/pytorch-lightning@2.3.0...2.3.1)

---
updated-dependencies:
- dependency-name: lightning
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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