Use four color palette colors instead of five for useStylesPreviewCol…

…ors (#64700)

Co-authored-by: richtabor <richtabor@git.wordpress.org>
Co-authored-by: Mamaduka <mamaduka@git.wordpress.org>

packages/edit-site/src/components/global-styles/preset-colors.js

@@ -5,7 +5,7 @@ import { useStylesPreviewColors } from './hooks';
 
 export default function PresetColors() {
 	const { paletteColors } = useStylesPreviewColors();
-	return paletteColors.slice( 0, 5 ).map( ( { slug, color }, index ) => (
+	return paletteColors.slice( 0, 4 ).map( ( { slug, color }, index ) => (
 		<div
 			key={ `${ slug }-${ index }` }
 			style={ {