Everyone has some level of bias. The best thing you can really do is try and counter your own bias when you notice it. In most jurisdictions not hiring someone based on racial or unfair judgements is illegal. Trying to change workplace culture away from meritocracy for the sake of diversity might sound noble and well intended, but just as 'meritocracy is a lie', so is diversity in that sense.
Hiring people based on how much diversity they provide based purely on their gender, race, etc is prejudice in itself, even if well intended.
