1.12.0-prepare (#5222)

* Update copyright year to 2025

* update release version

Author: xwm1992

NOTICE

@@ -1,5 +1,5 @@
 Apache EventMesh
-Copyright 2021-2024 The Apache Software Foundation
+Copyright 2021-2025 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).

gradle.properties

@@ -18,7 +18,7 @@
 jdk=1.8
 snapshot=false
 group=org.apache.eventmesh
-version=1.11.0-release
+version=1.12.0-release
 #last eight bits of public key
 signing.keyId=
 #passphrase for key pairs