Fix link to can_ada

Author: bbayles

README.rst

@@ -143,6 +143,6 @@ Alternative Python bindings
 
 This package uses `CFFI <https://github.com/ada-url/ada-python/>`__ to call
 the ``Ada`` library's functions, which has a performance cost.
-The alternative `can_ada <https://github.com/ada-url/ada-python/>`__ (Canadian Ada)
+The alternative `can_ada <https://github.com/tktech/can_ada>`__ (Canadian Ada)
 package uses `pybind11 <https://pybind11.readthedocs.io/en/stable/>`__ to generate a
 Python extension module, which is more performant.