[maven-release-plugin] prepare release v3.0.3

pom.xml

@@ -15,13 +15,12 @@
  ~ limitations under the License.
 -->
 
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 
     <parent>
         <groupId>org.wso2.carbon.devicemgt-plugins</groupId>
         <artifactId>siddhi-extensions</artifactId>
-        <version>3.0.3-SNAPSHOT</version>
+        <version>3.0.3</version>
         <relativePath>../pom.xml</relativePath>
     </parent>