try to add more space [ci skip]

Author: maxtepkeev

README.rst

@@ -10,6 +10,8 @@ Python-Redmine
 .. image:: https://img.shields.io/coveralls/maxtepkeev/python-redmine/master.svg
    :target: https://coveralls.io/r/maxtepkeev/python-redmine?branch=master
 
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 **!!!** Until the end of May 2018 - Pro Edition for **14.99$** instead of *24.99$*, more
 info `here <https://python-redmine.com/editions.html#pro-edition>`_ **!!!**