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

Author: Github Action

pom.xml

@@ -2,7 +2,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>fr.abes.api-communes</groupId>
     <artifactId>AccesCbs</artifactId>
-    <version>2.5.20</version>
+    <version>2.5.21-SNAPSHOT</version>
     <packaging>jar</packaging>
     <name>AccesCbs</name>
     <description>AccesCbs allows programs to interract with Sudoc French bibliographic database.</description>
@@ -30,7 +30,7 @@
         <connection>scm:git:https://github.com/abes-esr/accescbs.git</connection>
 	<developerConnection>scm:git:https://github.com/abes-esr/accescbs</developerConnection>
 	<url>https://github.com/abes-esr/accescbs</url>
-      <tag>2.5.20</tag>
+      <tag>HEAD</tag>
   </scm>
 
     <build>