#13373 - Class name in deprecation message

Make deprecation message verbose.

Query.php

@@ -591,7 +591,7 @@ public function from($tables = [], $overwrite = false)
     public function join($tables = null, $types = [], $overwrite = false)
     {
         if ($tables === null) {
-            deprecationWarning('Using Query::join() to read state is deprecated. Use clause("join") instead.');
+            deprecationWarning('Using Query::join() to read state is deprecated. Use Query::clause("join") instead.');
 
             return $this->_parts['join'];
         }