Fixed Orekit Python Wrapper version number

download.html

@@ -15,7 +15,7 @@ layout: default_orekit
   <a class="btn btn-warning" href="/download/orekit-latest-javadoc.jar" role="button">Get the Javadoc</a>
 </p>
 
-<h2>Orekit Python {{site.data.orekit-tutorials.versions.first}}</h2>
+<h2>Orekit Python {{site.data.orekit.versions.first}}</h2>
 
 <p>
   The Orekit Python Wrapper by Petrus Hyvönen (Swedish Space Corporation).<br/>