helptext: fix sample data sets url

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@57553 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/init/helptext.html

@@ -122,10 +122,11 @@ To create the GRASS database:
 </ol>
 
 <p>
-Sample data such as the "Spearfish" or the "North Carolina" sample datasets
-may be downloaded from 
-<a href="http://grass.osgeo.org/download/data.php">http://grass.osgeo.org/download/data.php</a>
-and the compressed data package(s) extracted into this new database directory.
+Sample data such as the &quot;North Carolina&quot; or the
+&quot;Spearfish&quot; sample datasets may be downloaded from
+<a href="http://grass.osgeo.org/download/sample-data/">http://grass.osgeo.org/download/sample-data/</a>
+and the compressed data package(s) extracted into this new database
+directory.
 <p>
 Now you are ready to select a sample dataset in the GRASS GIS startup screen
 (see above) and start the session.