Fix RAPIDS PR link in changelog (scverse#2086)

docs/release-notes/1.4.5.rst

@@ -15,7 +15,7 @@ Please install `scanpy==1.4.5.post3` instead of `scanpy==1.4.5`.
 
 - :mod:`~scanpy.pp.downsample_counts` now always preserves the dtype of it's input, instead of converting floats to ints :pr:`865` :smaller:`I Virshup`
 - allow specifying a base for :func:`~scanpy.pp.log1p` :pr:`931` :smaller:`G Eraslan`
-- run neighbors on a GPU using rapids :pr:`850` :smaller:`T White`
+- run neighbors on a GPU using rapids :pr:`830` :smaller:`T White`
 - param docs from typed params :smaller:`P Angerer`
 - :func:`~scanpy.tl.embedding_density` now only takes one positional argument; similar for :func:`~scanpy.pl.embedding_density`, which gains a param `groupby` :pr:`965` :smaller:`A Wolf`
 - webpage overhaul, ecosystem page, release notes, tutorials overhaul :pr:`960` :pr:`966` :smaller:`A Wolf`