Update "check examples" steps

Author: echarrod

.github/workflows/tests.yaml

@@ -42,9 +42,7 @@ jobs:
 
       - uses: actions/setup-python@v2.3.1
 
-      - run: pip install -U setuptools==45
-
-      - run: pip install wheel
+      - run: pip install --upgrade setuptools
 
       - run: pushd examples/aml && pip install -r requirements.txt && popd