Update content/czi-sympy-wrapup.rst

Co-authored-by: Timo Stienstra <[email protected]>

content/czi-sympy-wrapup.rst

@@ -160,7 +160,7 @@ TODO : Link to the paper that Luke cites.
 
 In 2014, we switched to using ``LUsolve()`` for all of the linear solves in
 SymPy Mechanics in `PR 7581`_, which resulted in a unnoticed regression of
-divide-by-zero issues for complex problems. That change broke the crucial
+divide-by-zero issues for complex problems. This change broke the crucial
 `test_kane3.py`_ as well as the corresponding `documentation page
 <https://docs.sympy.org/latest/modules/physics/mechanics/examples/bicycle_example.html>`_
 that solved the linear Carvallo-Whipple bicycle model to a machine precision