Docs: Various docblock corrections relating to parameter types.

See #51800


git-svn-id: https://develop.svn.wordpress.org/trunk@49692 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-object-cache.php

@@ -170,7 +170,7 @@ class WP_Object_Cache {
 	 *
 	 * @since 3.0.0
 	 *
-	 * @param array $groups List of groups that are global.
+	 * @param string|string[] $groups List of groups that are global.
 	 */
 	public function add_global_groups( $groups ) {
 		$groups = (array) $groups;