Please list shard_max_size as not relevant to hash partitioning

Link:

http://docs.citusdata.com/en/v8.2/develop/api_guc.html#citus-shard-max-size-integer

I had a customer get confused about shard_max_size and think it applied to hash partitioning. Please update this page to mention that it most likely doesn't apply to their use case and is deprecated and only relevant to append distribution.