Bump pytorch-lightning from 1.6.5 to 1.8.5.post0 (borchero#32)

Bumps [pytorch-lightning](https://github.com/Lightning-AI/lightning) from 1.6.5 to 1.8.5.post0.
- [Release notes](https://github.com/Lightning-AI/lightning/releases)
- [Commits](Lightning-AI/pytorch-lightning@1.6.5...1.8.5.post0)

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

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>