[3.10] bpo-44342: [Enum] improve test, add andrei kulakov to ACKS (GH-26726)

* [3.10] [Enum] improve test, add andrei kulakov to ACKS (GH-26726).
(cherry picked from commit cb2014f2077c92c35486bf0db7e646a68478a7a5)

Co-authored-by: Ethan Furman <ethan@stoneleaf.us>
diff --git a/Doc/library/enum.rst b/Doc/library/enum.rst
index 2d19ef6..077a354 100644
--- a/Doc/library/enum.rst
+++ b/Doc/library/enum.rst
@@ -576,7 +576,7 @@
          ...     NEON = 31
          Traceback (most recent call last):
          ...
-         ValueError: invalid Flag 'Color': 'WHITE' is missing a named flag for value 8; 'NEON' is missing named flags for values 8, 16
+         ValueError: invalid Flag 'Color': aliases WHITE and NEON are missing combined values of 0x18 [use enum.show_flag_values(value) for details]
 
 .. note::