Fix annotation for pre-post sync example

pre-post-sync/components/post-sync-job.yaml

@@ -4,7 +4,7 @@ metadata:
   generateName: after-
   annotations:
     argocd.argoproj.io/hook: PostSync
-    argocd.argoproj.io/hook-delete-policy: OnSuccess
+    argocd.argoproj.io/hook-delete-policy: HookSucceeded
 spec:
   template:
     spec:

pre-post-sync/components/pre-sync-job.yaml

@@ -4,7 +4,7 @@ metadata:
   generateName: before-
   annotations:
     argocd.argoproj.io/hook: PreSync
-    argocd.argoproj.io/hook-delete-policy: OnSuccess
+    argocd.argoproj.io/hook-delete-policy: HookSucceeded
 spec:
   template:
     spec: