Update lightning dependency version to 2.6.0

Author: twsl

project/pyproject.toml.jinja

@@ -35,7 +35,7 @@ classifiers = [
 [tool.poetry.dependencies]
 python = "^{{ python_version }}"{% if include_sample_code %}
 torch = "^2.9.0"
-lightning = "^2.5.6"{% endif %}
+lightning = "^2.6.0"{% endif %}
 
 [tool.poetry.group.dev.dependencies]
 ruff = "^0.14.7"