[maven-release-plugin] prepare release checkstyle-10.12.3

Author: github-actions[bot]

pom.xml

@@ -12,7 +12,7 @@
 
   <groupId>com.puppycrawl.tools</groupId>
   <artifactId>checkstyle</artifactId>
-  <version>10.12.3-SNAPSHOT</version>
+  <version>10.12.3</version>
   <packaging>jar</packaging>
 
   <name>checkstyle</name>