vhost-user.rst: Fix vring address description

There is no "size" field in vring address structure. Remove it.

Fixes: 5fc0e00 ("Add vhost-user protocol documentation")
Signed-off-by: Andrey Ignatov <rdna@apple.com>
Message-Id: <20240112004555.64900-1-rdna@apple.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit aa05bd9)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

docs/interop/vhost-user.rst

@@ -148,9 +148,9 @@ Vring descriptor indices for packed virtqueues
 A vring address description
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-+-------+-------+------+------------+------+-----------+-----+
-| index | flags | size | descriptor | used | available | log |
-+-------+-------+------+------------+------+-----------+-----+
++-------+-------+------------+------+-----------+-----+
+| index | flags | descriptor | used | available | log |
++-------+-------+------------+------+-----------+-----+
 
 :index: a 32-bit vring index