fix(tiger): adjust invalid queries

tests/query/highlights/tiger/object-oriented.tig

@@ -12,13 +12,13 @@ let
     var a := 12
 
     method meth() : int = self.a
-    /* <- keyword.method */
+    /* <- method */
     /*     ^ method */
     /*                    ^ variable.builtin */
   }
 
   var object := new B
-  /*            ^ keyword.constructor */
+  /*            ^ constructor */
 in
   object.a := 27;
   /*     ^ property */