The text there is styled the way it is because it's in an inline roll: [[1t[Wild-Magic]]]. As far as I'm aware, there's no way to undo that without being able to edit the character sheet code and change the styling of that rolltemplate output. If you're using any of the By Roll20 sheets, you can't do this (they hide the code), and you don't want to do it with any community sheets that are still being updated (you lose access to any future updates). There are markdown commands to make text bold and/or italic, but not to remove those stylings. To make this change is pretty complex. If your sheet has multiple rolltemplates available, others might have an appearance you find more attractive. Try them all.