fix: typo in css className

Author: olzzon

packages/webui/src/client/ui/PieceIcons/Renderers/SplitInputIcon.tsx

@@ -54,7 +54,7 @@ export default class SplitInputIcon extends React.Component<{
 	render(): JSX.Element {
 		return (
 			<svg
-				className="piece_icon"
+				className="piece-icon"
 				version="1.1"
 				viewBox="0 0 126.5 89"
 				xmlns="http://www.w3.org/2000/svg"