CI: No need to explictly avoid setuptools 47.2.0

It's an old release from June 2020.

Author: DimitriPapadopoulos

.github/workflows/tests.yml

@@ -57,7 +57,7 @@ jobs:
         run: |
           python --version  # just to check
           python -m pip install --upgrade pip
-          pip install --upgrade "setuptools!=47.2.0" docutils setuptools_scm[toml] twine
+          pip install --upgrade setuptools docutils setuptools_scm[toml] twine
           pip install -e ".[dev]" # install the codespell dev packages
       - run: pip install aspell-python-py3
         if: startsWith(matrix.os, 'ubuntu')