bpo-4630: Fix errors in Lib/idlelib/NEWS.txt (GH-21594)

Also one in news log.

Author: ZackerySpytz

Lib/idlelib/NEWS.txt

@@ -63,9 +63,9 @@ bpo-38636: Fix IDLE Format menu tab toggle and file indent width. These
 functions (default shortcuts Alt-T and Alt-U) were mistakenly disabled
 in 3.7.5 and 3.8.0.
 
-bpo-4360: Add an option to toggle IDLE's cursor blink for shell,
+bpo-4630: Add an option to toggle IDLE's cursor blink for shell,
 editor, and output windows.  See Settings, General, Window Preferences,
-Cursor Blink.  Patch by Zachary Spytz.
+Cursor Blink.  Patch by Zackery Spytz.
 
 bpo-26353: Stop adding newline when saving an IDLE shell window.
 

Misc/NEWS.d/3.9.0a1.rst

@@ -5081,7 +5081,7 @@ Stop adding newline when saving an IDLE shell window.
 
 Add an option to toggle IDLE's cursor blink for shell, editor, and output
 windows.  See Settings, General, Window Preferences, Cursor Blink. Patch by
-Zachary Spytz.
+Zackery Spytz.
 
 ..