Remove hardcoded version in github-release-plugin

Author: joewiz

pom.xml

@@ -181,8 +181,8 @@
             </goals>
             <inherited>false</inherited>
             <configuration>
-              <description>eXist-db documentation app for eXist-db 5.3.1</description>
-              <releaseName>v5.3.1</releaseName>
+              <description>eXist-db documentation app for eXist-db ${exist.version}</description>
+              <releaseName>v${exist.version}</releaseName>
               <tag>${project.version}</tag>
               <fileSets>
                 <fileSet>