Fix rst syntax.

methane · methane · commit 4bff55db9fe7 · 2012-06-27T18:25:56.000+09:00
diff --git a/README.rst b/README.rst
@@ -72,7 +72,7 @@ You can use ``pip`` or ``easy_install`` to install msgpack::
 
 
 Windows
-''''''''
+^^^^^^^
 msgpack provides some binary distribution for Windows.
 You can install msgpack without compiler with them.
 
