Update the documentation to add internalapi connectivity to helper pod

Based on the PR change #232
The internalapi network connectivity change should be reflected in the
user documentation.

docs_user/modules/proc_migrating-ovn-data.adoc

@@ -74,6 +74,7 @@ metadata:
   name: ovn-copy-data
   annotations:
     openshift.io/scc: anyuid
+    k8s.v1.cni.cncf.io/networks: internalapi
   labels:
     app: adoption
 spec: