feat(uv) use dependency-groups.dev in pyproject.toml

See [legacy tool.uv.dev-dependencies in uv docs](https://docs.astral.sh/uv/concepts/dependencies/#default-groups)
 
It fixes #22

Author: zed

{{cookiecutter.project_name}}/pyproject.toml

@@ -23,8 +23,8 @@ Homepage = "https://{{cookiecutter.author_github_handle}}.github.io/{{cookiecutt
 Repository = "https://github.com/{{cookiecutter.author_github_handle}}/{{cookiecutter.project_name}}"
 Documentation = "https://{{cookiecutter.author_github_handle}}.github.io/{{cookiecutter.project_name}}/"
 
-[tool.uv]
-dev-dependencies = [
+[dependency-groups]
+dev = [
     "pytest>=7.2.0",
     "pre-commit>=2.20.0",
     "tox-uv>=1.11.3",