Help/About: Update the About page for WordPress 5.9.3.

Props audrasjb, SergeyBiryukov.
Fixes #55473.


git-svn-id: https://develop.svn.wordpress.org/branches/5.9@53073 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/about.php

@@ -42,6 +42,31 @@ require_once ABSPATH . 'wp-admin/admin-header.php';
 		<div class="about__section changelog">
 			<div class="column">
 				<h2><?php _e( 'Maintenance and Security Releases' ); ?></h2>
+				<p>
+					<?php
+					printf(
+						/* translators: 1: WordPress version number, 2: plural number of bugs. */
+						_n(
+							'<strong>Version %1$s</strong> addressed %2$s bug.',
+							'<strong>Version %1$s</strong> addressed %2$s bugs.',
+							18
+						),
+						'5.9.3',
+						number_format_i18n( 18 )
+					);
+					?>
+					<?php
+					printf(
+						/* translators: %s: HelpHub URL. */
+						__( 'For more information, see <a href="%s">the release notes</a>.' ),
+						sprintf(
+							/* translators: %s: WordPress version. */
+							esc_url( __( 'https://wordpress.org/support/wordpress-version/version-%s/' ) ),
+							sanitize_title( '5.9.3' )
+						)
+					);
+					?>
+				</p>
 				<p>
 					<?php
 					printf(