Update main.yml

Author: mcbarton

.github/workflows/main.yml

@@ -300,7 +300,7 @@ jobs:
             sudo safaridriver --enable
             python -m pip install selenium
             echo "Running test_xeus_cpp in Safari"
-            emrun --no_browser --kill_exit --timeout 60 --browser-args="--headless --no-sandbox"  test_xeus_cpp.html &
+            python ${{ env.BUILD_PREFIX }}/bin/emrun.py --no_browser --kill_exit --timeout 60 --browser-args="--headless --no-sandbox"  test_xeus_cpp.html &
             python browser_tests_safari.py test_xeus_cpp.html
           else
             # Install Google Chrome