Bump pytorch-lightning from 1.1.0 to 1.6.0

Bumps [pytorch-lightning](https://github.com/Lightning-AI/lightning) from 1.1.0 to 1.6.0.
- [Release notes](https://github.com/Lightning-AI/lightning/releases)
- [Changelog](https://github.com/Lightning-AI/lightning/blob/1.6.0/CHANGELOG.md)
- [Commits](Lightning-AI/pytorch-lightning@1.1.0...1.6.0)

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

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

requirements.txt

@@ -5,7 +5,7 @@ scipy
 matplotlib
 # cpu version: nnutils-pytorch
 nnutils-pytorch-cuda
-pytorch-lightning==1.1.0
+pytorch-lightning==1.6.0
 torch>=1.13<1.14
 torchvision>=0.14<0.15
 torchaudio>=0.13<0.14