fix URL of OGR pages

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@44480 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/v.external.out/v.external.out.html

@@ -31,7 +31,7 @@ v.select ainput=cities atype=point binput=forests btype=area operator=within out
 
 <h2>REFERENCES</h2>
 
-OGR Pages: <a href="http://www.gdal.osgeo.org/ogr">http://www.gdal.osgeo.org/ogr</a>
+OGR Pages: <a href="http://gdal.osgeo.org/ogr">http://gdal.osgeo.org/ogr</a>
 
 <h2>AUTHOR</h2>