[web] Update the change role icon on web

Summary:
The icon for the change role action item in the members modal is currently a plus-circle. After some discussion, we need to use the new edit-1 icon part of the CommIcon component.

MenuItem defaults to using a SWMansionIcon if a icon name is provided:

let menuItemIcon = iconComponent;
if (icon) {
  menuItemIcon = <SWMansionIcon size="100%" icon={icon} />;
}

so instead I used the existing iconComponent prop to pass in the CommIcon we're using.

Test Plan:
The new icon looks as expected

Reviewers: atul, ginsu

Reviewed By: ginsu

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D8479