fix version tag

Author: satra

doc/_templates/sidebar_versions.html

@@ -17,7 +17,7 @@ <h3>{{ _('Versions') }}</h3>
                 <td align="left">Release</td><td align="right">Devel</td>
             </tr>
             <tr>
-                <td align="left">0.10.0</td><td align="right">{% version %}</td>
+                <td align="left">0.10.0</td><td align="right">{{ version }}</td>
             </tr>
             <tr>
                 <td align="left"><a href="{{pathto('users/install')}}">Download</a></td>