Fixed link in BinaryVector docstring

Author: caseyclements

bson/binary.py

@@ -256,10 +256,8 @@ def __init__(
         :param padding: The number of bits in the final byte that are to be ignored
           when a vector element's size is less than a byte
           and the length of the vector is not a multiple of 8.
-          (This is equivalent to a negative value of `count` in`numpy.unpackbits`_)
-
-        .. _numpy.unpackbits: https://numpy.org/doc/stable/reference/generated/numpy.unpackbits.html
-
+          (This is equivalent to a negative value of `count` in
+          `numpy.unpackbits <https://numpy.org/doc/stable/reference/generated/numpy.unpackbits.html>`_)
         """
         self.data = data
         self.dtype = dtype