fix (posts block): use wp_kses_post instead of esc_html to allow dynamic content (#3620)

Author: Arukuen

src/block/posts/index.php

@@ -132,7 +132,7 @@ function generate_render_item_from_stackable_posts_block( $post, $attributes, $t
 
 		// Read More Link.
 		if ( strpos( $new_template, '!#readmoreText!#' ) !== false ) {
-			$new_template = str_replace( '!#readmoreText!#', esc_html( $readmore_text ), $new_template );
+			$new_template = str_replace( '!#readmoreText!#', wp_kses_post( $readmore_text ), $new_template );
 		}
 
 		return $new_template;