Update mocking.md

mocking.md

@@ -348,7 +348,7 @@ As an alternative to mocking, you may use the `Queue` facade's `fake` method to
                 new FinalJob('bar'),
             ]);
 
-            // Assert a job was pushed without chain of jobs...
+            // Assert a job was pushed without a chain of jobs...
             Queue::assertPushedWithoutChain(ShipOrder::class);
         }
     }