Split up Execution of examples and tests in CI

There seems to be some unintentional side effect when running examples and the
same time.  This change breaks up the execution into two separate calls to
pytest in an attempt to bypass whatever issue is being created.

.github/workflows/main.yml

@@ -101,8 +101,9 @@ jobs:
     - name: Run Tests
       run: |
         mkdir $SCREENSHOT_DIR
-        pytest tests examples -v \
+        pytest tests -v \
-          --junitxml pytest.xml \
+          --junitxml pytest.xml 
+        pytest examples -v
       shell: bash
     - name: Upload Screenshots
       uses: actions/upload-artifact@v2