Improved PHPDoc for JDatabaseDriver::updateObject (#25134)

The $key parameter can be either an array or a string but from PHPDoc it was only an array

libraries/joomla/database/driver.php

@@ -2203,10 +2203,10 @@ public function truncateTable($table)
 	/**
 	 * Updates a row in a table based on an object's properties.
 	 *
-	 * @param   string   $table    The name of the database table to update.
-	 * @param   object   &$object  A reference to an object whose public properties match the table fields.
-	 * @param   array    $key      The name of the primary key.
-	 * @param   boolean  $nulls    True to update null fields or false to ignore them.
+	 * @param   string        $table    The name of the database table to update.
+	 * @param   object        &$object  A reference to an object whose public properties match the table fields.
+	 * @param   array|string  $key      The name of the primary key.
+	 * @param   boolean       $nulls    True to update null fields or false to ignore them.
 	 *
 	 * @return  boolean  True on success.
 	 *