Update README.rst
Pypi upload fails with rst rendering error. README is updated
accordingly to fix it.
@@ -41,7 +41,7 @@ Now you can execute Sysl on the command line with ::
See ``sysl --help`` and ``reljam --help`` for more options.
Docker
-~~~~~
+~~~~~~
Install `Docker <https://docs.docker.com/install/>`_ and pull the Docker Image with ::
> docker pull anzbank/sysl
