Update Sim screenshots

[terracoda]

This sim needs screenshots on the website. It now has the "Preferences menu" and "All Audio" in the navbar. We forgot to do this before publication.

@arouinfar, who would normally take care of this? Is this something I should know how to do?

[arouinfar]

@terracoda see phetsims/gravity-force-lab-basics#315 (comment) for more information about the screenshot process. Updating the screenshots on the sim page will require a maintenance release. I've committed updated screenshots to master and the 1.5 branch (see commits above).

Back to @terracoda @jbphet and responsible-dev @jessegreenberg to determine the priority of a maintenance release.

[jessegreenberg]

Happy to do this along with phetsims/gravity-force-lab-basics#315, unless @jbphet would rather see this through. Feel free to reassign to me when ready.

[jbphet]

I'm not attached to doing it, so have at it @jessegreenberg. I think the QA team is skilled at creating these screenshots, so perhaps you can have them create the images and just do the maintenance release step.