ps.map manual page: fix wiki url

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@32075 15284696-431f-4ddb-bdfa-cd5b030d7da7

ps/ps.map/description.html

@@ -1575,7 +1575,7 @@ This script file can be entered at the command line:
 
 <P>
 More examples can be found on the
-<a href="http://grass.gdf-hannover.de/wiki/Ps.map_scripts">GRASS Wiki</a>
+<a href="http://grass.osgeo.org/wiki/Ps.map_scripts">GRASS Wiki</a>
 help site.
 <P>