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

pom.xml

@@ -28,7 +28,7 @@ under the License.
   </parent>
 
   <artifactId>maven-source-plugin</artifactId>
-  <version>3.3.0</version>
+  <version>3.3.1-SNAPSHOT</version>
   <packaging>maven-plugin</packaging>
 
   <name>Apache Maven Source Plugin</name>
@@ -58,7 +58,7 @@ under the License.
   <scm>
     <connection>scm:git:https://gitbox.apache.org/repos/asf/maven-source-plugin.git</connection>
     <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/maven-source-plugin.git</developerConnection>
-    <tag>maven-source-plugin-3.3.0</tag>
+    <tag>HEAD</tag>
     <url>https://github.com/apache/maven-source-plugin/tree/${project.scm.tag}</url>
   </scm>
   <issueManagement>
@@ -79,7 +79,7 @@ under the License.
   <properties>
     <javaVersion>8</javaVersion>
     <mavenVersion>3.2.5</mavenVersion>
-    <project.build.outputTimestamp>2023-05-17T21:31:06Z</project.build.outputTimestamp>
+    <project.build.outputTimestamp>2023-05-17T21:31:27Z</project.build.outputTimestamp>
   </properties>
 
   <dependencyManagement>