docs: Update conntrack established state description
Patch ("conntrack: Fix conntrack new state") fixes
the userspace conntrack behavior.  This patch updates the
corresponding conntrack state description.
Fixes: ("conntrack: Fix conntrack new state")
Reported-by: Roni Bar Yanai
Acked-by: Roni Bar Yanai
@@ -2566,8 +2566,8 @@ actions=clone(load:0->NXM_OF_IN_PORT[],output:123)
<dt><code>est</code> (0x02)</dt>
<dd>
- Part of an existing connection. Set to 1 if this is a committed
- connection.
+ Part of an existing connection. Set to 1 if packets of a committed
+ connection have been seen by conntrack from both directions.
</dd>
<dt><code>rel</code> (0x04)</dt>
