Update README.md

Author: jlmorton

README.md

@@ -5,7 +5,7 @@ The Tableau Extract API is not thread-safe when inserting a row to the extract,
 
 Included in the utility is a thin wrapper to publish an extract to Tableau.
 
-The latest version is 1.1, which is [available here](https://github.com/jlmorton/tableau/releases/download/1.2/tableau-sdk-wrapper-1.2.zip).
+The latest version is 1.2, which is [available here](https://github.com/jlmorton/tableau/releases/download/1.2/tableau-sdk-wrapper-1.2.zip).
 
 # Performance
 On my small dual core Macbook Pro, I see the following performance: