v.out.postgis: document 'options=srid=3358'

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@55303 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/v.out.postgis/v.out.postgis.html

@@ -26,7 +26,9 @@ Additional creation options can be defined by <b>options</b> parameter:
   on FID column, default: <tt>YES</tt></li>
   <li><tt>TOPOSCHEMA_NAME=&lt;schema name&gt;</tt> - name of PostGIS
   Topology schema (relevant only for <b>-l</b> flag),
-  default: <tt>topo_&lt;input&gt;</tt>
+  default: <tt>topo_&lt;input&gt;</tt></li>
+  <li><tt>SRID=&lt;value&gt;</tt> - spatial reference identifier,
+  default: not defined</li>
 </ul>
 
 Note that <em>options</em> defined