ovs-actions.xml: Fix inconsistency in documentation of controller action.
"controller_id" was written as "controller-id" in one place.  This spells
it consistently.
Acked-by: Numan Siddique
@@ -699,7 +699,7 @@ $ ovs-ofctl -O OpenFlow10 add-flow br0 actions=mod_nw_src:1.2.3.4
<dt><code>id=</code><var>controller_id</var></dt>
<dd>
- Specify <var>controller-id</var>, a 16-bit integer, as the connection
+ Specify <var>controller_id</var>, a 16-bit integer, as the connection
ID of the OpenFlow controller or controllers to which the
``packet-in'' message should be sent. The default is zero. Zero is
also the default connection ID for each controller connection, and a
