[maven-release-plugin] prepare release web3j-maven-plugin-4.12.1

pom.xml

@@ -3,7 +3,7 @@
     <groupId>org.web3j</groupId>
     <artifactId>web3j-maven-plugin</artifactId>
     <packaging>maven-plugin</packaging>
-    <version>4.12.1-SNAPSHOT</version>
+    <version>4.12.1</version>
 
     <name>web3j Maven Mojo</name>
     <description>Mojo's web3j Maven plugin is used to create java classes based on the solidity
@@ -40,7 +40,7 @@
         <connection>scm:git:git://[email protected]/hyperledger/${project.artifactId}.git</connection>
         <developerConnection>scm:git:ssh://[email protected]/hyperledger/${project.artifactId}.git</developerConnection>
         <url>https://github.com/hyperledger/${project.artifactId}.git</url>
-        <tag>web3j-maven-plugin-4.11.3</tag>
+        <tag>web3j-maven-plugin-4.12.1</tag>
     </scm>
 
     <dependencies>