deps(deps): update lightning requirement from <2.6,>=2 to >=2,<2.7 (#83)

Updates the requirements on [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: lightning
  dependency-version: 2.6.0
  dependency-type: direct:production
...

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Author: dependabot[bot]

pyproject.toml

@@ -36,7 +36,7 @@ classifiers = [
 # Please make an issue if you need wider range of versions
 dependencies = [
   "anndata>=0.10.2,<0.13",
-  "lightning>=2,<2.6",
+  "lightning>=2,<2.7",
   "numpy>=1.16.1,<2.4",
   "pandas>=1.2,<2.4",
   "scanpy>=1.9.5,<1.12",