Update action.yml

Author: mcbarton

.github/actions/Emscripten-Notebook-Tests/action.yml

@@ -84,7 +84,6 @@ runs:
         # Jupyter Lite website.
         kill -9 $jupyter_lite_process_id
         
-        pkill -f "jupyter|jupyter-lite" || true
-        kill -9 $(lsof -t -i:8000) 2>/dev/null || true
-        sudo lsof -nP -iTCP -sTCP:LISTEN | grep -E "8000|jupyter|python|http"
-        kill -9 $(lsof -t -i:8000) 2>/dev/null || true
+        pkill -f "jupyter|jupyter-lite" || :
+        PID=$(lsof -t -i:8000 || :) && [ -n "$PID" ] && kill -9 $PID || :
+