fix program 25 to behave as described in comment

[mbkulik]

Currently 25.prg produces different output than is described in the comment # print 14, 12, 10, ... 0.

As written, it produces the following output:

0
12
10
8
6
4
2

The following PR, modifies 25.prg to produce the output as described in the program comment.

14
12
10
8
6
4
2
0

[jackdoe]

thanks a lot for finding this out!
i will make a note for it on the webpage as well, and make sure i use it when i re-print the deck

[jackdoe]

i added attribution with 9fee9c9, you can see it at the bottom of the page: https://punkx.org/4917/

thanks again for the fix