r.path manual: added missing width tag, needed for wxGUI manual renderer

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@71968 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.path/r.path.html

@@ -185,7 +185,7 @@ gaps in the raster path when using the Knight's move.
 
 <div align="center">
 <a href="r_path_with_bitmask.png">
-    <img src="r_path_with_bitmask.png" alt="least cost path using bitmask" height="300">
+    <img src="r_path_with_bitmask.png" alt="least cost path using bitmask" width="600" height="274">
 </a>
 <br>
 <i>Figure: Comparison of shortest paths using single directions and