[maven-release-plugin] prepare release v4

pom.xml

@@ -11,7 +11,7 @@
 
     <groupId>de.77zzcx7.nbs-cloud</groupId>
     <artifactId>nbs-cloud-aggregator</artifactId>
-    <version>4-SNAPSHOT</version>
+    <version>4</version>
     <packaging>pom</packaging>
     <description>The umbrella for all No BullShit cloud projects</description>
     <name>nbs-cloud-aggregator</name>
@@ -49,7 +49,7 @@
         <connection>scm:git:https://77zzcx7.de/gitea/MK13/NoBullShit-cloud.git</connection>
         <developerConnection>${scmDeveloperConnectionProp}</developerConnection>
         <url>https://77zzcx7.de/gitea/MK13/NoBullShit-cloud</url>
-      <tag>HEAD</tag>
+      <tag>v4</tag>
   </scm>
 
     <dependencyManagement>