Minor change

Author: komamitsu

msgpack-jackson/README.md

@@ -347,9 +347,10 @@ When you serialize an object that has a nested object also serializing with Obje
   }
 ```
 
-This code throws NullPointerException since the nested MessagePackFactory modifies a shared state stored in ThreadLocal. There are a few options to fix this issue, but they introduce performance degredations while this usage is a corner case. A workaround that doesn't affect performance is to call `MessagePackFactory#setReuseResourceInGenerator(false)`. I think it might be inconvenient to call the API for users, but it's a reasonable tradeoff with performance for now.
+This code throws NullPointerException since the nested MessagePackFactory modifies a shared state stored in ThreadLocal. There are a few options to fix this issue, but they introduce performance degredations while this usage is a corner case. A workaround that doesn't affect performance is to call `MessagePackFactory#setReuseResourceInGenerator(false)`. It might be inconvenient to call the API for users, but it's a reasonable tradeoff with performance for now.
 
 ```java
   ObjectMapper objectMapper = new ObjectMapper(
     new MessagePackFactory().setReuseResourceInGenerator(false));
-```
+```
+