Professional Business: Fixed a few vertical margins that were missed in previous commits

professional-business/sass/blocks/_blocks.scss

@@ -263,7 +263,7 @@
 	.wp-block-latest-posts.is-grid {
 		li {
 			border-top: 2px solid $color__border;
-			padding-top: (1 * $size__spacing-unit);
+			padding-top: $size__spacing-unit;
 			margin-bottom: $size__vertical-spacing-unit;
 			a {
 				&:after {