Inline documentation cleanup for 4.0 audit.

Document the first parameter, `$time`, in the 'oembed_ttl' filter, added in [28972].

See #14759 and #28885.


git-svn-id: https://develop.svn.wordpress.org/trunk@29160 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-embed.php

@@ -198,6 +198,7 @@ class WP_Embed {
 			 *
 			 * @since 4.0.0
 			 *
+			 * @param int    $time    Time to live (in seconds).
 			 * @param string $url     The attempted embed URL.
 			 * @param array  $attr    An array of shortcode attributes.
 			 * @param int    $post_ID Post ID.