[maven-release-plugin] prepare release web3j-maven-plugin-4.12.3

Author: gtebrean

pom.xml

@@ -3,7 +3,7 @@
     <groupId>org.web3j</groupId>
     <artifactId>web3j-maven-plugin</artifactId>
     <packaging>maven-plugin</packaging>
-    <version>4.12.3-SNAPSHOT</version>
+    <version>4.12.3</version>
 
     <name>web3j Maven Mojo</name>
     <description>Mojo's web3j Maven plugin is used to create java classes based on the solidity