Remove -SNAPSHOT for release v0.30.0

Author: xyang16

examples/pom.xml

@@ -5,12 +5,12 @@
 
     <groupId>ai.djl</groupId>
     <artifactId>examples</artifactId>
-    <version>0.30.0-SNAPSHOT</version>
+    <version>0.30.0</version>
 
     <properties>
         <maven.compiler.source>11</maven.compiler.source>
         <maven.compiler.target>11</maven.compiler.target>
-        <djl.version>0.30.0-SNAPSHOT</djl.version>
+        <djl.version>0.30.0</djl.version>
         <exec.mainClass>ai.djl.examples.inference.cv.ObjectDetection</exec.mainClass>
     </properties>