fix(wizard): use patternfly-styles to set the no padding modifier (#3871)

Signed-off-by: Boaz Shuster <boaz.shuster.github@gmail.com>

Author: tlabaj

packages/react-core/src/components/Wizard/WizardBody.tsx

@@ -13,7 +13,7 @@ export const WizardBody: React.FunctionComponent<WizardBodyProps> = ({
   children,
   hasBodyPadding = true
 }: WizardBodyProps) => (
-  <main className={css(styles.wizardMain, !hasBodyPadding && 'pf-m-no-padding')}>
+  <main className={css(styles.wizardMain, !hasBodyPadding && styles.modifiers.noPadding)}>
     <div className={css(styles.wizardMainBody)}>{children}</div>
   </main>
 );