Docs: Add a `@since` note for the `recovery_mode_email` filter about the `$email` argument now including the `attachments` key.

Follow-up to [48964].

See #51276.
Built from https://develop.svn.wordpress.org/trunk@48994


git-svn-id: http://core.svn.wordpress.org/trunk@48756 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-recovery-mode-email-service.php

@@ -206,6 +206,7 @@ When seeking help with this issue, you may be asked for some of the following in
 		 * Filters the contents of the Recovery Mode email.
 		 *
 		 * @since 5.2.0
+		 * @since 5.6.0 The `$email` argument includes the `attachments` key.
 		 *
 		 * @param array  $email {
 		 *     Used to build a call to wp_mail().

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.6-alpha-48993';
+$wp_version = '5.6-alpha-48994';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.