colorize toc's li items

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@59696 15284696-431f-4ddb-bdfa-cd5b030d7da7

man/grassdocs.css

@@ -103,6 +103,7 @@ table.toc{
 
 li.toc {
    margin-left: -15px;
+   color: rgb(25%, 60%, 25%);
 }
 
 ul.toc {