doc: imgs follow wiki:Submitting/Docs (better graphical index)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@72309 15284696-431f-4ddb-bdfa-cd5b030d7da7

imagery/i.topo.corr/i.topo.corr.html

@@ -11,7 +11,7 @@ Note: If needed, the sun position can be calculated for a given date with
 
 
 <center>
-<img src="terrain_correction.png" alt="Figure showing terrain and solar angles"><br>
+<img src="i_topo_corr_angles.png" alt="Figure showing terrain and solar angles"><br>
 Figure showing terrain and solar angles
 </center>