Fix PR citation

Author: mwaskom

doc/whatsnew/v0.12.2.rst

@@ -10,7 +10,7 @@ v0.12.2 (Unreleased)
 
 - |Fix| Fixed a regression in v0.12.0 where manually-added labels could have duplicate legend entries (:pr:`3116`).
 
-- |Fix| Normed properties using a :class:`objects.Continuous` scale  no longer raise on boolean data (:pr:`3189`).
+- |Fix| Normed properties using a :class:`objects.Continuous` scale  no longer raise on boolean data (:pr:`3190`).
 
 - |Fix| Fixed a bug in :func:`histplot` with `kde=True` and `log_scale=True` where the curve was not scaled properly (:pr:`3173`).