[maven-release-plugin] prepare branch rel/0.4
diff --git a/plc4cpp/pom.xml b/plc4cpp/pom.xml
index 236e1c0..2ce8f27 100644
--- a/plc4cpp/pom.xml
+++ b/plc4cpp/pom.xml
@@ -59,7 +59,7 @@
         <executions>
           <execution>
             <id>default-jar</id>
-            <phase/>
+            <phase />
           </execution>
         </executions>
       </plugin>
diff --git a/plc4j/examples/hello-webapp/service/pom.xml b/plc4j/examples/hello-webapp/service/pom.xml
index 506598f..7b2feca 100644
--- a/plc4j/examples/hello-webapp/service/pom.xml
+++ b/plc4j/examples/hello-webapp/service/pom.xml
@@ -18,8 +18,7 @@
   under the License.
   -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
   <parent>
diff --git a/plc4j/examples/hello-webapp/webapp/pom.xml b/plc4j/examples/hello-webapp/webapp/pom.xml
index fb1e8e8..a5fc706 100644
--- a/plc4j/examples/hello-webapp/webapp/pom.xml
+++ b/plc4j/examples/hello-webapp/webapp/pom.xml
@@ -18,8 +18,7 @@
   under the License.
   -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
   <parent>
diff --git a/plc4j/utils/interop/pom.xml b/plc4j/utils/interop/pom.xml
index 28d5f02..213f072 100644
--- a/plc4j/utils/interop/pom.xml
+++ b/plc4j/utils/interop/pom.xml
@@ -17,9 +17,7 @@
   limitations under the License.
 
 -->
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 
   <modelVersion>4.0.0</modelVersion>
 
diff --git a/pom.xml b/pom.xml
index 8786d0f..a9888f6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,8 +17,7 @@
   limitations under the License.
 
 -->
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 
   <modelVersion>4.0.0</modelVersion>
 
@@ -45,7 +44,7 @@
     <connection>scm:git:https://gitbox.apache.org/repos/asf/plc4x.git</connection>
     <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/plc4x.git</developerConnection>
     <url>https://github.com/apache/plc4x</url>
-    <tag>HEAD</tag>
+    <tag>rel/0.4</tag>
   </scm>
 
   <!-- Only configure the site distribution as the rest is handled by the apache parent -->
@@ -1505,7 +1504,7 @@
                         </goals>
                       </pluginExecutionFilter>
                       <action>
-                        <ignore/>
+                        <ignore />
                       </action>
                     </pluginExecution>
                   </pluginExecutions>