release version of language

.. but not parent as it might need different <properties>
diff --git a/pom.xml b/pom.xml
index f6ebfc6..31db9d1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -31,7 +31,7 @@
 	<name>Apache Taverna Workbench</name>
         <description>Graphical workbench for editing and running Apache Taverna workflows</description>
         <properties>
-            <taverna.language.version>0.15.0-incubating-SNAPSHOT</taverna.language.version>
+            <taverna.language.version>0.15.0-incubating</taverna.language.version>
             <taverna.osgi.version>0.2.0-incubating-SNAPSHOT</taverna.osgi.version>
             <taverna.engine.version>3.1.0-incubating-SNAPSHOT</taverna.engine.version>
             <taverna.commonactivities.version>2.1.0-incubating-SNAPSHOT</taverna.commonactivities.version>