Twenty Twenty-One: Add a missing HTML comment to indicate the end of `.post-thumbnail` section.

Props haritpanchal.
Fixes #55724.

Built from https://develop.svn.wordpress.org/trunk@53399


git-svn-id: http://core.svn.wordpress.org/trunk@52988 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-content/themes/twentytwentyone/inc/template-tags.php

@@ -203,7 +203,7 @@ if ( ! function_exists( 'twenty_twenty_one_post_thumbnail' ) ) {
 				<?php if ( wp_get_attachment_caption( get_post_thumbnail_id() ) ) : ?>
 					<figcaption class="wp-caption-text"><?php echo wp_kses_post( wp_get_attachment_caption( get_post_thumbnail_id() ) ); ?></figcaption>
 				<?php endif; ?>
-			</figure>
+			</figure><!-- .post-thumbnail -->
 
 		<?php endif; ?>
 		<?php

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-53398';
+$wp_version = '6.1-alpha-53399';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.