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

(cherry picked from commit 54636355805dd2877bb54fbad8d967e1ddd8b553)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>
diff --git a/Misc/NEWS.d/3.9.0a5.rst b/Misc/NEWS.d/3.9.0a5.rst
index 01cbd44..ede281b 100644
--- a/Misc/NEWS.d/3.9.0a5.rst
+++ b/Misc/NEWS.d/3.9.0a5.rst
@@ -232,7 +232,7 @@
 
 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.
 
 ..