Update README.rst

README.rst

@@ -27,7 +27,7 @@ Each tutorial includes ``source code`` and most of them are associated with a ``
 Sponsorship
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-To support maintaining and upgrading this project, please consider `Sponsoring the project developer <https://github.com/sponsors/astorfi/dashboard>`_
+To support maintaining and upgrading this project, please consider `Sponsoring the project developer <https://github.com/sponsors/astorfi/dashboard>`_.
 
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 Table of Contents