Docs: Add the parameter name for the `wp_roles_init` action.

[39082] missed adding the name of the parameter to the docs of the `wp_roles_init` action.

Props johnbillion for the catch.
See #23016.


Built from https://develop.svn.wordpress.org/trunk@39083


git-svn-id: http://core.svn.wordpress.org/trunk@39025 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-roles.php

@@ -133,7 +133,7 @@ class WP_Roles {
 		 *
 		 * @since 4.7.0
 		 *
-		 * @param WP_Roles A reference to the WP_Roles object.
+		 * @param WP_Roles $this A reference to the WP_Roles object.
 		 */
 		do_action( 'wp_roles_init', $this );
 	}

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-beta1-39082';
+$wp_version = '4.7-beta1-39083';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.