Use version_file instead of write_to in pyproject.toml

See #13 and https://setuptools-scm.readthedocs.io/en/latest/config/

{{cookiecutter.project_slug}}/pyproject.toml

 [build-system]
 requires = [
     "setuptools>=62.6",
-    "setuptools_scm[toml]>=6.2",
+    "setuptools_scm[toml]>=8.0",
     "wheel"
 ]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools_scm]
-write_to = "{{cookiecutter.project_slug}}/_version.py"
+version_file = "{{cookiecutter.project_slug}}/_version.py"
 
 [tool.pylint]
 ignore = "_version.py"