RestForwarder: Add missing override annotation

Change-Id: I5d26ac406978279842c82a0fad844080b950e5cb

src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarder.java

diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarder.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarder.java
index ea4ad10..c0eb6ae 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarder.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarder.java
@@ -83,6 +83,7 @@
         event);
   }
 
+  @Override
   public CompletableFuture<Boolean> batchIndexChange(
       String projectName, int changeId, IndexEvent event) {
     return execute(