[CI] Relax setuptools requirement on Windows

.github/workflows/main.yml

@@ -344,7 +344,7 @@ jobs:
           architecture: x64
       - name: Install Python dependencies
         run: |
-          python -m pip install -U pip 'setuptools>=47.0.0,<48'
+          python -m pip install -U pip 'setuptools>=43.0.0'
           python -m pip install scons pypiwin32 numpy ruamel.yaml cython h5py pandas pytest pytest-github-actions-annotate-failures
       - name: Restore Boost cache
         uses: actions/cache@v2