[maven-release-plugin] prepare for next development iteration

pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>codes.thischwa</groupId>
     <artifactId>cloudflaredns</artifactId>
-    <version>0.3.0</version>
+    <version>0.4.0-SNAPSHOT</version>
     <name>CloudflareDNS-java</name>
     <inceptionYear>2025</inceptionYear>
     <packaging>jar</packaging>
@@ -58,7 +58,7 @@
         <developerConnection>scm:git:git@gitlab.com:th-schwarz/CloudflareDNS-java.git</developerConnection>
         <connection>scm:git:git@gitlab.com:th-schwarz/CloudflareDNS-java.git</connection>
         <url>https://gitlab.com/th-schwarz/CloudflareDNS-java</url>
-        <tag>v0.3.0</tag>
+        <tag>v0.1.0</tag>
     </scm>
 
     <distributionManagement>