[maven-release-plugin] prepare release kadaster-gds2-3.1

pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>nl.b3p</groupId>
     <artifactId>kadaster-gds2</artifactId>
-    <version>3.1-SNAPSHOT</version>
+    <version>3.1</version>
     <packaging>jar</packaging>
     <description>JAX-WS classes voor benaderen van de Generieke Download Service 2 van het Kadaster.</description>
     <name>Kadaster-GDS2</name>
@@ -32,7 +32,7 @@
         <connection>scm:git:[email protected]:B3Partners/kadaster-gds2.git</connection>
         <developerConnection>scm:git:[email protected]:B3Partners/kadaster-gds2.git</developerConnection>
         <url>https://github.com/B3Partners/kadaster-gds2.git</url>
-        <tag>HEAD</tag>
+        <tag>kadaster-gds2-3.1</tag>
     </scm>
     <issueManagement>
         <system>Jira</system>