Update "export_todo.py" utility.

Author: KelSolaar

utilities/export_todo.py

@@ -33,11 +33,11 @@
 
 | **Colour - Checker Detection** by Colour Developers
 | Copyright © 2018-2019 – Colour Developers – \
-`colour-science@googlegroups.com <colour-science@googlegroups.com>`_
+`colour-science@googlegroups.com <colour-science@googlegroups.com>`__
 | This software is released under terms of New BSD License: \
 https://opensource.org/licenses/BSD-3-Clause
 | `https://github.com/colour-science/colour-checker-detection \
-<https://github.com/colour-science/colour-checker-detection>`_
+<https://github.com/colour-science/colour-checker-detection>`__
 """ [1:]