fix: padding not working correctly for mobile in Heading Block

Mobile Padding was checking if tablet padding exists in Heading Block.
Fixes Codeinwp/otter-internals#185

inc/css/blocks/class-advanced-heading-css.php

@@ -490,7 +490,7 @@ public function render_css( $block ) {
 						'property'  => '--padding-mobile',
 						'value'     => 'paddingMobile',
 						'condition' => function( $attrs ) {
-							return isset( $attrs['paddingTablet'] ) && is_array( $attrs['paddingTablet'] );
+							return isset( $attrs['paddingMobile'] ) && is_array( $attrs['paddingMobile'] );
 						},
 						'format'    => function( $value ) {
 							return CSS_Utility::render_box( $value );