[Bug] Not able to run workcell demo for the given ur5_2f_test scene

[Prabhakaran-Gokul]

I was not able to run the workcell demo for the given ur5_2f_test scene by running the following:
ros2 launch ur5_2f_test demo.launch.py

Turns out that the variable scene_pkg in line 23 of the ~/workcell_ws/src/scenes/ur5_2f_test/launch/demo.launch.py file has to be assigned to ur5_2f_test instead. (eg. scene_pkg = ur5_2f_test)