`tests/data/test_package_generation` fails every new year as the year is hardcoded

Describe the Bug

Every year the regression test will generate a package based on the current year when the test files will have the previous year

To Reproduce

Wait until a new year and watch tests fail on a PR

Expected Behaviour

Ideally we could either ignore the year or update the year somehow with @renovatebot or something

Actual Behaviour

  ============================= test session starts ==============================
  platform linux -- Python 3.12.8, pytest-8.3.4, pluggy-1.5.0 -- /home/runner/work/python-tooling/python-tooling/.tox/py312/bin/python
  cachedir: .tox/py312/.pytest_cache
  rootdir: /home/runner/work/python-tooling/python-tooling
  configfile: pyproject.toml
  collecting ... collected 8 items
  
  tests/data/test_package_generation/tests/test_dummy.py::test_stupid_example PASSED [ 12%]
  tests/test_git_init.py::test_initialisation_of_git_repo[True] PASSED     [ 25%]
  tests/test_git_init.py::test_initialisation_of_git_repo[False] PASSED    [ 37%]
  tests/test_package_generation.py::test_package_generation FAILED         [ 50%]
  tests/test_package_generation.py::test_pip_installable PASSED            [ 62%]
  tests/test_package_generation.py::test_optional_funder[] PASSED          [ 75%]
  tests/test_package_generation.py::test_optional_funder[STFC] PASSED      [ 87%]
  {{cookiecutter.project_slug}}/tests/test_dummy.py::test_stupid_example PASSED [100%]
  
  =================================== FAILURES ===================================
  ___________________________ test_package_generation ____________________________
  
  tmp_path = PosixPath('/tmp/pytest-of-runner/pytest-0/test_package_generation0')
  generate_package = <function _generate_package at 0x7fa89eb311c0>
  
      def test_package_generation(
          tmp_path: pathlib.Path,
          generate_package: typing.Callable,
      ) -> None:
          """Test package generation."""
          test_config = {
              "github_owner": "test-user",
              "project_short_description": "description",
              "project_name": "Cookiecutter Test",
              # Not having a git repo makes it easier to check in/out reference
              # data files to the main python-tooling git repository
              "initialise_git_repository": False,
          }
          generate_package(config=test_config, path=tmp_path)
      
          expected_package_dir = (
              pathlib.Path(__file__).parent / "data" / "test_package_generation"
          )
          # Check project directory exists
          test_project_dir = tmp_path / "cookiecutter-test"
          assert test_project_dir.exists()
      
          actual_files = get_all_files_folders(test_project_dir)
          expected_files = get_all_files_folders(expected_package_dir)
      
          assert actual_files == expected_files
      
          # Check diff between actual and expected file contents
          diff = ""
          for file in actual_files:
              actual_file = test_project_dir / file
              expected_file = expected_package_dir / file
      
              if actual_file.is_dir():
                  continue
      
              with actual_file.open() as f1, expected_file.open() as f2:
                  diff += "".join(
                      difflib.unified_diff(
                          f1.readlines(),
                          f2.readlines(),
                          fromfile=str(actual_file),
                          tofile=str(expected_file),
                      )
                  )
      
          if diff:
              shutil.rmtree(expected_package_dir)
              shutil.move(test_project_dir, expected_package_dir)
              msg = (
                  "Non-zero diff between generated files and expected files.\n"
                  "Test data files have been modified with new content.\n"
                  "Diff is:\n"
                  f"{diff}"
              )
  >           raise RuntimeError(msg)
  E           RuntimeError: Non-zero diff between generated files and expected files.
  E           Test data files have been modified with new content.
  E           Diff is:
  E           --- /tmp/pytest-of-runner/pytest-0/test_package_generation0/cookiecutter-test/mkdocs.yml
  E           +++ /home/runner/work/python-tooling/python-tooling/tests/data/test_package_generation/mkdocs.yml
  E           @@ -1,7 +1,7 @@
  E            site_name: "Cookiecutter Test"
  E            site_description: "Documentation website for Cookiecutter Test"
  E            site_author: "Eva Lu Ator"
  E           -copyright: "Copyright © 2025 Eva Lu Ator"
  E           +copyright: "Copyright © 2024 Eva Lu Ator"
  E            repo_url: "https://github.com/test-user/cookiecutter-test/"
  E            repo_name: "test-user/cookiecutter-test"
  E            edit_uri: edit/main/docs/
  E           --- /tmp/pytest-of-runner/pytest-0/test_package_generation0/cookiecutter-test/LICENSE.md
  E           +++ /home/runner/work/python-tooling/python-tooling/tests/data/test_package_generation/LICENSE.md
  E           @@ -1,6 +1,6 @@
  E            <!-- markdownlint-disable MD041 --># MIT License
  E            
  E           -Copyright (c) 2025 Eva Lu Ator
  E           +Copyright (c) 2024 Eva Lu Ator
  E            
  E            Permission is hereby granted, free of charge, to any person obtaining a copy of

Version In Use

v1.0.0

Additional Context

Start with tests/test_package_generation.py and the reference files under tests/data/test_package_generation. Run the package-generation test and inspect the year differences in mkdocs.yml and LICENSE.md. Done means the generated package and expected data remain consistent when the calendar year changes.