VL-4836 - Prep work for release

pom.xml
-------
  o Bump sadis.api version to the latest release 5.9.0

miscellaneous
-------------
  o Update copyright notice to the latest date and syntax.

Change-Id: Ie9a35ae703da9b9796afb8ea857738991d4d07d1
diff --git a/app/src/main/java/org/opencord/igmpproxy/impl/IgmpSender.java b/app/src/main/java/org/opencord/igmpproxy/impl/IgmpSender.java
index 9152cec..f42c794 100644
--- a/app/src/main/java/org/opencord/igmpproxy/impl/IgmpSender.java
+++ b/app/src/main/java/org/opencord/igmpproxy/impl/IgmpSender.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-present Open Networking Foundation
+ * Copyright 2017-2023 Open Networking Foundation (ONF) and the ONF Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.