v.split manual: improve section title

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@73785 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/v.split/v.split.html

@@ -15,7 +15,7 @@ their category as key, all segments originating from the same original
 line are linked to the same line in the original attribute table which
 is just copied to the new map.
 
-<h3>Notes on segment length information</h3>
+<h3>Notes on individual segment information</h3>
 
 When running <em>v.to.db</em> on a map produced by <em>v.split</em>,
 <em>v.to.db</em> will add length information for each segment in its