Kingsley: fix json syntax error in the footer (#5224)

kingsley/block-template-parts/footer.html

@@ -1,4 +1,4 @@
-<!-- wp:group {"style":{"spacing":{"padding":{"top":"20px";"bottom":"20px"}}}} -->
+<!-- wp:group {"style":{"spacing":{"padding":{"top":"20px","bottom":"20px"}}}} -->
 <div class="wp-block-group" style="padding-top:20px;padding-bottom:20px"><!-- wp:paragraph {"align":"center","fontSize":"small"} -->
 <p class="has-text-align-center has-small-font-size"><a href="https://wordpress.com">Proudly Powered by WordPress.com.</a></p>
 <!-- /wp:paragraph --></div>