Adding releasing instructions

Signed-off-by: Emmanuel Hugonnet <[email protected]>

README.md

@@ -24,7 +24,14 @@ FYI - Pre-built versions of the resource adapter archive used to be available in
 
 1. Download the source via any of the methods which GitHub provides (e.g. the [tags](https://github.com/jms-ra/generic-jms-ra/tags) page).
 2. Execute 'mvn install' to build the code.
-3. Execute 'mvn -Prelease install' to generate the deployable resource adapter.
+
+## Releasing instructions
+
+```
+mvn release:prepare -Pjboss-release
+
+mvn release:perform -Pjboss-release
+```
 
 
 ## Transaction Support