[MNT] [Dependabot](deps): Update pytorch-lightning requirement

Updates the requirements on [pytorch-lightning](https://github.com/Lightning-AI/lightning) to permit the latest version.
- [Release notes](https://github.com/Lightning-AI/lightning/releases)
- [Commits](Lightning-AI/pytorch-lightning@2.0.0...2.6.0)

---
updated-dependencies:
- dependency-name: pytorch-lightning
  dependency-version: 2.6.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -43,7 +43,7 @@ dependencies = [
     "numpy<=3.0.0",
     "pandas>=1.1.5,<3.0.0",
     "scikit-learn>=1.3.0,<2.0",
-    "pytorch-lightning>=2.0.0,<2.5.0",
+    "pytorch-lightning>=2.0.0,<2.7.0",
     "scipy>=1.8,<2.0",
     "omegaconf>=2.3.0",
     "torchmetrics>=0.10.0,<1.7.0",