scribble/manual: change history sort order

Now that some entries have changes over multiple versions, a forward
sort order seems better than reverse to me.

pkgs/scribble-pkgs/scribble-lib/scribble/private/manual-history.rkt

@@ -43,7 +43,7 @@
               (car from))))
      (para
       #:style (style "SHistory" (list scheme-properties))
-      (for/list ([e (in-list (sort es (lambda (a b) (version<? b a))
+      (for/list ([e (in-list (sort es (lambda (a b) (version<? a b))
                                    #:key history-entry-vers))]
                  [i (in-naturals)])
         (define vers (history-entry-vers e))