icons: Amend 'hand' icon with better Figma definition
icons: Amend 'hand' icon with better Figma definition

Following-up I24a62fefcebf160 with a slightly changed 'hand' icon by
improved Figma definition to have vertical lines also on pixel grid
to satisfy original task description request.

Bug: T248631
Change-Id: I6a75c71d68389b418aec1f15134aac880b97fe15

wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui