r.water.outlet manual: addon URLs must be absolute, not relative

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@72846 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.water.outlet/r.water.outlet.html

@@ -59,7 +59,7 @@ r.report map=basin_A30 units=h
 <h2>SEE ALSO</h2>
 
 <em>
-<a href="r.wateroutlet.lessmem.html">r.wateroutlet.lessmem</a>,
+<a href="https://grass.osgeo.org/grass7/manuals/addons/r.wateroutlet.lessmem.html">r.wateroutlet.lessmem</a> (addon),
 <a href="d.where.html">d.where</a>,
 <a href="r.basins.fill.html">r.basins.fill</a>,
 <a href="r.watershed.html">r.watershed</a>,