DOC: prepare changelog for release

Author: gdementen

doc/source/changes/version_0_35.rst.inc

@@ -49,7 +49,7 @@ New features
   directly, without having to use the matplotlib API. This is the new default
   behavior, unless a ``filepath`` is given.
 
-* implemented a new kind of plot: `heatmap`. It can be used like this:
+* implemented a new kind of plot: ``heatmap``. It can be used like this:
 
     >>> arr.plot.heatmap()