Update README.md

Fixed extra space that broke up a word.
diff --git a/README.md b/README.md
index 639eadf..d542d76 100644
--- a/README.md
+++ b/README.md
@@ -72,7 +72,7 @@
 }
 ```
 
-we will need a `com.fasterxml.jackson.databind.ObjectMapper` instance, used for all data-b inding, so let's construct one:
+we will need a `com.fasterxml.jackson.databind.ObjectMapper` instance, used for all data-binding, so let's construct one:
 
 ```java
 ObjectMapper mapper = new ObjectMapper(); // create once, reuse