Media: Add `/` character to `<img>` tag in `wp_print_media_templates()`.

While this has no effect on void elements in HTML5, it fixes a minor inconsistency with the rest of core.

Follow-up to [47493], [48834], [50556], [51473], [51541].

Props shital-patel, akabarikalpesh.
Fixes #53870.
Built from https://develop.svn.wordpress.org/trunk@51542


git-svn-id: http://core.svn.wordpress.org/trunk@51153 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/media-template.php

@@ -1479,7 +1479,7 @@ function wp_print_media_templates() {
 
 	<?php // Template for the Crop area layout, used for example in the Customizer. ?>
 	<script type="text/html" id="tmpl-crop-content">
-		<img class="crop-image" src="{{ data.url }}" alt="<?php esc_attr_e( 'Image crop area preview. Requires mouse interaction.' ); ?>">
+		<img class="crop-image" src="{{ data.url }}" alt="<?php esc_attr_e( 'Image crop area preview. Requires mouse interaction.' ); ?>" />
 		<div class="upload-errors"></div>
 	</script>
 

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-51541';
+$wp_version = '5.9-alpha-51542';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.