ui.pixel-formats: fix using list in example
ui.pixel-formats: fix using list in example

erg/factor,mcandre/factor,mcandre/factor,mcandre/factor,erg/factor,erg/factor,erg/factor,mcandre/factor,erg/factor,mcandre/factor,erg/factor,mcandre/factor,mcandre/factor,erg/factor