Add a WordPress credit block pattern and load it in the template.

block-template-parts/footer.html

@@ -1,7 +1,7 @@
 <!-- wp:group {"align":"wide","style":{"spacing":{"padding":{"bottom":"max(1.25rem, 5vw)","top":"8rem","right":"max(1.25rem, 5vw)","left":"max(1.25rem, 5vw)"}}},"layout":{"type":"flex","justifyContent":"space-between"}} -->
 <div class="wp-block-group alignwide" style="padding-top:8rem;padding-right:max(1.25rem, 5vw);padding-bottom:max(1.25rem, 5vw);padding-left:max(1.25rem, 5vw)"><!-- wp:site-title {"level":0} /-->
 
-<!-- wp:paragraph {"align":"right"} -->
-<p class="has-text-align-right">Proudly Powered by <a href="https://wordpress.org" rel="nofollow">WordPress</a></p>
-<!-- /wp:paragraph --></div>
+<!-- wp:pattern {"slug":"twentytwentytwo/wordpress-credit"} /-->
+
+</div>
 <!-- /wp:group -->

inc/block-patterns.php

@@ -31,6 +31,7 @@ function twentytwentytwo_register_block_patterns() {
 				'header-centered-logo-in-navigation',
 				'header-centered-title-navigation-social',
 				'header-title-and-button',
+				'wordpress-credit',
 			);
 
 			foreach ( $block_patterns as $block_pattern ) {

inc/patterns/wordpress-credit.php

@@ -0,0 +1,12 @@
+<?php
+/**
+ * WordPress Credit block pattern
+ *
+ */
+return array(
+	'title'       => __( 'WordPress Credit', 'twentytwentytwo' ),
+	'categories'  => array( 'twentytwentytwo' ),
+	'content'     => '<!-- wp:paragraph {"align":"right"} -->
+<p class="has-text-align-right">' . __( 'Proudly powered by ', 'twentytwentytwo' ) . '<a href="https://wordpress.org" rel="nofollow">WordPress</a></p>
+<!-- /wp:paragraph -->'
+);