[Tips] Make sure you have set correctly when you use `account-history-rocksdb` plugin

Recently when we read the source code of Steem, we found that we have a wrong setting instruction about tracking account history.

As we know, the account history data requires to enable account_history or account_history_rocksdb plugin.
We should be care that these two plugins have similar configurations. They are not use same configurations.

Like this configuration:

account-history-track-account-range =  ["from", "to"]  # This is used under account_history plugin
account-history-rocksdb-track-account-range =  ["from", "to"]  # This is used under account_history_rocksdb plugin

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