C# Replicator Documentation

Bug found in C# Replicator Stop Documentation: https://docs.couchbase.com/couchbase-lite/current/csharp/replication.html#lbl-repl-stop.

There's no need for the removal of listeners before stop. In the documentation, "Remove any active change listener prior to stopping your replication" in #2 should be removed or moved after #3. Otherwise, users cannot get notified about the status changes.