docs fix project overview URL

Author: ahbarnett

docs/overview.src

@@ -24,7 +24,7 @@ It has been developed since 2017 at the `Center for Computational Mathematics
 <https://www.simonsfoundation.org/flatiron/center-for-computational-mathematics/>`_ at the `Flatiron Institute <https://www.simonsfoundation.org/flatiron>`_,
 by :ref:`Alex Barnett and others<ackn>`,
 and is released under an
-`Apache v2 license <https://github.com/flatironinstitute/finufft/blob/master/LICENSE>`_. Here is a `project overview <https://users.flatironinstitute.org/~ahb/notes/finufft-project-summary-2023.pdf)`_.
+`Apache v2 license <https://github.com/flatironinstitute/finufft/blob/master/LICENSE>`_. Here is a `project overview <https://users.flatironinstitute.org/~ahb/notes/finufft-project-summary-2023.pdf>`_.
 
 What does FINUFFT do?
 -----------------------