Fix workflow test results filenames

Author: shanejbrown

.github/workflows/build.yaml

@@ -56,8 +56,8 @@ jobs:
         chmod 600 ~/.ssh/buildrunner-deploy-*
     - name: Test with pytest
       run: |
-        pytest -v -m "not serial" --numprocesses=auto --junitxml=test-reports/serial-test-results.xml
-        pytest -v -m "serial" --junitxml=test-reports/non-serial-test-results.xml
+        pytest -v -m "not serial" --numprocesses=auto --junitxml=test-reports/non-serial-test-results.xml
+        pytest -v -m "serial" --junitxml=test-reports/serial-test-results.xml
         python scripts/combine_xml.py test-reports/serial-test-results.xml test-reports/non-serial-test-results.xml > test-reports/test-result.xml
     - name: Publish test results
       uses: EnricoMi/publish-unit-test-result-action/linux@v2