github_actions: use unittest instead of nose

.github/workflows/pymi-cd.yml

@@ -24,7 +24,7 @@ jobs:
         pip install -r requirements.txt || exit /b
         pip install nose testtools wheel || exit /b
         pip install . || exit /b
-        nosetests wmi || exit /b
+        python -m unittest discover || exit /b
         python setup.py bdist_wheel || exit /b
     - uses: actions/upload-artifact@v4
       with: