Fix version of documentation module

Author: atextor

documentation/pom.xml

@@ -18,7 +18,7 @@
    <parent>
       <artifactId>esmf-sdk-parent</artifactId>
       <groupId>org.eclipse.esmf</groupId>
-      <version>DEV-SNAPSHOT</version>
+      <version>2.2.0</version>
       <relativePath>../pom.xml</relativePath>
    </parent>
    <modelVersion>4.0.0</modelVersion>