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

pom.xml

@@ -25,14 +25,14 @@ limitations under the License.
   </parent>
 
   <artifactId>plexus-velocity</artifactId>
-  <version>2.1.0</version>
+  <version>2.1.1-SNAPSHOT</version>
 
   <name>Plexus Velocity Component</name>
 
   <scm>
     <connection>scm:git:https://github.com/codehaus-plexus/plexus-velocity.git</connection>
     <developerConnection>${project.scm.connection}</developerConnection>
-    <tag>plexus-velocity-2.1.0</tag>
+    <tag>HEAD</tag>
     <url>https://github.com/codehaus-plexus/plexus-velocity</url>
   </scm>
   <issueManagement>
@@ -48,7 +48,7 @@ limitations under the License.
 
   <properties>
     <slf4jVersion>1.7.36</slf4jVersion>
-    <project.build.outputTimestamp>2023-12-23T22:25:32Z</project.build.outputTimestamp>
+    <project.build.outputTimestamp>2023-12-23T22:25:45Z</project.build.outputTimestamp>
   </properties>
 
   <dependencies>