fix: text color contrast of payment methods w/ dark bg

Author: frosso

client/checkout/blocks/payment-methods-logos/style.scss

@@ -21,7 +21,7 @@
 		width: 38px;
 		height: 24px;
 		background-color: rgba( $gray-700, 0.1 );
-		color: $gray-900;
+		color: var( --wp--preset--color--contrast, $gray-900 );
 		text-align: center;
 		line-height: 24px;
 		border-radius: 3px;