I18N: Add new strings to about.php for use with end-of-life updates.

This changeset adds two additional translation strings in the changelog file, for use when releasing the final version of WordPress on a particular branch.

Props peterwilsoncc, audrasjb, mukesh27.
Merges [55350] to the 5.9 branch.
Fixes #57216.



git-svn-id: https://develop.svn.wordpress.org/branches/5.9@55373 602fd350-edb4-49c9-b593-d223f7449a82

Author: peterwilsoncc

src/wp-admin/about.php

@@ -475,3 +475,9 @@
 
 /* translators: 1: WordPress version number, 2: Link to update WordPress */
 __( 'Important! Your version of WordPress (%1$s) will stop receiving security updates in the near future. To keep your site secure, please <a href="%2$s">update to the latest version of WordPress</a>.' );
+
+/* translators: %s: The major version of WordPress for this branch. */
+__( 'This is the final release of WordPress %s' );
+
+/* translators: The localized WordPress download URL. */
+__( 'https://wordpress.org/download/' );