Privacy: Change `@since` entry for `user_request_confirmed_email_subject` filter added in [43373] to 4.9.8.

See #44382.
Built from https://develop.svn.wordpress.org/trunk@43451


git-svn-id: http://core.svn.wordpress.org/trunk@43278 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/user.php

@@ -3061,7 +3061,7 @@ All at ###SITENAME###
 	/**
 	 * Filters the subject of the user request confirmation email.
 	 *
-	 * @since 4.9.7
+	 * @since 4.9.8
 	 *
 	 * @param string $subject    The email subject.
 	 * @param string $sitename   The name of the site.

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-alpha-43447';
+$wp_version = '5.0-alpha-43451';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.