CREDITS: simplify the end-of-file alphabetical order comment

The existing comment references specific individuals by name which becomes
outdated as new entries are added.  Simplify it to state the alphabetical
ordering rule clearly without depending on who happens to be the last
entry.

Link: https://lkml.kernel.org/r/20260312011741.846664-2-hisamshar@gmail.com
Signed-off-by: Hisam Mehboob <hisamshar@gmail.com>
Suggested-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jakub Kacinski <kuba@kernel.org>
Cc: Simon Horman <horms@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

CREDITS

@@ -4560,8 +4560,5 @@ D: MD driver
 D: EISA/sysfs subsystem
 S: France
 
-# Don't add your name here, unless you really _are_ after Marc
-# alphabetically. Leonard used to be very proud of being the
-# last entry, and he'll get positively pissed if he can't even
-# be second-to-last.  (and this file really _is_ supposed to be
-# in alphabetic order)
+# Don't add your name here unless you really are last alphabetically.
+# (This file is supposed to be kept in alphabetical order by last name.)