bpo-39871: Fix an error in a news entry (GH-21749)

(cherry picked from commit 5463635)

Co-authored-by: Zackery Spytz <[email protected]>

Author: miss-islington

Misc/NEWS.d/3.9.0a5.rst

@@ -232,7 +232,7 @@ exits before trying to take the GIL.
 
 Fix a possible :exc:`SystemError` in ``math.{atan2,copysign,remainder}()``
 when the first argument cannot be converted to a :class:`float`. Patch by
-Zachary Spytz.
+Zackery Spytz.
 
 ..