Docs: Add missing `@param` and `@return` notations to the DocBlock for `WP_Feed_Cache_Transient::save()`.

See #32246.


git-svn-id: https://develop.svn.wordpress.org/trunk@36728 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-feed.php

@@ -50,6 +50,9 @@ class WP_Feed_Cache_Transient {
 
 	/**
 	 * @access public
+	 *
+	 * @param SimplePie $data Data to save.
+	 * @return true Always true.
 	 */
 	public function save($data) {
 		if ( $data instanceof SimplePie ) {