deps: bump pytorch-lightning from 2.5.5 to 2.5.6

Bumps [pytorch-lightning](https://github.com/Lightning-AI/lightning) from 2.5.5 to 2.5.6.
- [Release notes](https://github.com/Lightning-AI/lightning/releases)
- [Commits](Lightning-AI/pytorch-lightning@2.5.5...2.5.6)

---
updated-dependencies:
- dependency-name: pytorch-lightning
  dependency-version: 2.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

extra-requirements-linux.txt

@@ -7,7 +7,7 @@ opencv-python-headless==4.12.0.88
 timm==1.0.21
 numpy==2.2.4
 onnx==1.19.1
-pytorch-lightning==2.5.5
+pytorch-lightning==2.5.6
 safetensors==0.6.2
 scenedetect[opencv]
 yt-dlp==2025.10.22

extra-requirements-windows.txt

@@ -9,7 +9,7 @@ einops==0.8.1
 numpy==2.2.4
 triton-windows==3.5.0.post21
 onnxruntime-directml==1.23.0
-pytorch-lightning==2.5.5
+pytorch-lightning==2.5.6
 safetensors==0.6.2
 scenedetect[opencv]
 yt-dlp==2025.10.22