whatsnew-3.10: Mention PEP 647 in the Release highlights section. (GH-99853)

Mention PEP 647 in the Release highlights section.

Also re-ordered the list so it matches the order in the details sections below.
(cherry picked from commit d74a58872c243bc766055d42f8280721629e3c82)

Co-authored-by: Yilei "Dolee" Yang <yileiyang@google.com>

diff --git a/Doc/whatsnew/3.10.rst b/Doc/whatsnew/3.10.rst
index 549fdda3aa4e04bdf27d1e381b97c1b7f37c7876..d0b436664ac33f476afecd652e4f0a0c6b39e5d7 100644 (file)
--- a/Doc/whatsnew/3.10.rst
+++ b/Doc/whatsnew/3.10.rst
@@ -77,8 +77,9 @@ Interpreter improvements:
 New typing features:
 
 * :pep:`604`, Allow writing union types as X | Y
-* :pep:`613`, Explicit Type Aliases
 * :pep:`612`, Parameter Specification Variables
+* :pep:`613`, Explicit Type Aliases
+* :pep:`647`, User-Defined Type Guards
 
 Important deprecations, removals or restrictions: