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

pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>github-client</artifactId>
-    <version>0.2.20</version>
+    <version>0.3.1-SNAPSHOT</version>
 
     <parent>
         <groupId>com.spotify</groupId>
@@ -23,7 +23,7 @@
         <connection>scm:git:https://github.com/spotify/github-java-client.git</connection>
         <developerConnection>scm:git:git@github.com:spotify/github-java-client.git</developerConnection>
         <url>scm:https://github.com/spotify/github-java-client/</url>
-        <tag>v0.3.0</tag>
+        <tag>HEAD</tag>
     </scm>
 
     <organization>
@@ -84,7 +84,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <project.build.outputTimestamp>1718794112</project.build.outputTimestamp>
+        <project.build.outputTimestamp>1718794157</project.build.outputTimestamp>
         <spotbugs.excludeFilterFile>spotbugsexclude.xml</spotbugs.excludeFilterFile>
         <checkstyle.violationSeverity>error</checkstyle.violationSeverity>
         <checkstyle.config.location>checkstyle.xml</checkstyle.config.location>