Urban, in the sense of urban or inner city youth, might be a reference to black children. (Or it might not. And one might actually be referencing urban things in the sense of not suburban or rural.)
Vibrant: makes, ahem, people living with color blindness feel marginalized.
Hardworking: I’m struggling to come up with something even as credible as the last two. Maybe it’s ableist: some people can’t work hard.
Brown bag: I’m guessing this is in a similar category to “tarball” from the rather regrettable list out of Stanford recently: it has nothing whatsoever to do with equity or inequity, but one might imagine an alternative etymology in which it has an inequitable meaning, connotation or origin. So brown bag could somehow be about brown people, even though as far as I can tell, neither the origin of the phrase nor any common uses are at all related to skin color.
At this rate, we risk running out of English words. Fortunately, English has a lot of words :)