regarding description about rnat connfailover.

[Provide your feedback here]

I found the new release that fixed description about rnat connfailover.
furthermore,13.0 and 13.1 will be fixed description at next release.because incorrect information.

if possible,could you please fix the description all of 12.0 / 13.0 /13.1 about rnat connfailover?

below is latest man command of 12.1

```

> show ver
NetScaler NS12.1: Build 64.16.nc, Date: Jan 19 2022, 18:37:08 (64-bit)
Done

> man set rnat
SET RNAT(NSCLI) Citrix Systems Inc. SET RNAT(NSCLI)
NAME
set rnat
SYNOPSIS
set rnat (( [] [-natIP @ ...]) |
( [-redirectPort ] [-natIP @ ...])) [-td
] [-srcippersistency ( ENABLED | DISABLED )]
[-useproxyport ( ENABLED | DISABLED )] [-ownerGroup ]
[-connfailover ( ENABLED | DISABLED )]
DESCRIPTION
(snip)
**connfailover
Synchronize all connection-related information for the RNAT
sessions with the secondary ADC in a high availability (HA)
pair.**
Possible values: ENABLED, DISABLED
Default value: DISABLED
```

Docs URL:https://developer-docs.citrix.com/projects/citrix-adc-command-reference/en/12.1/network/rnat/rnat/