Correct 2.5.2c1 uuid. Add IDLE release date.

Lib/idlelib/NEWS.txt

 What's New in IDLE 1.2.2c1?
 =========================
 
-*Release date: XX-FEB-2008*
+*Release date: 14-FEB-2008*
 
 - There was an error on exit if no sys.exitfunc was defined. Issue 1647.
   (backport r60227)

Tools/msi/uuids.py

@@ -33,6 +33,6 @@ product_codes = {
     '2.5.150': '{0a2c5854-557e-48c8-835a-3b9f074bdcaa}', # 2.5.0
     '2.5.1121':'{0378b43e-6184-4c2f-be1a-4a367781cd54}', # 2.5.1c1
     '2.5.1150':'{31800004-6386-4999-a519-518f2d78d8f0}', # 2.5.1
-    '2.5.2150':'{6304a7da-1132-4e91-a343-a296269eab8a}', # 2.5.2c1
+    '2.5.2121':'{6304a7da-1132-4e91-a343-a296269eab8a}', # 2.5.2c1
     '2.5.2150':'{6b976adf-8ae8-434e-b282-a06c7f624d2f}', # 2.5.2
 }