Install selenium for safari tests deploy-pages.yml

Author: mcbarton

.github/workflows/deploy-pages.yml

@@ -169,6 +169,7 @@ jobs:
         echo "Running DynamicLibraryManagerTests in Google Chrome"          
         emrun --browser="Google Chrome" --kill_exit --timeout 60 --browser-args="--headless --no-sandbox"  DynamicLibraryManagerTests.html
         sudo safaridriver --enable
+        python -m pip install selenium
         echo "Running CppInterOpTests in Safari"
         emrun --no_browser --kill_exit --timeout 60 --browser-args="--headless --no-sandbox"  CppInterOpTests.html &
         python browser_tests_safari.py CppInterOpTests.html