Fix broken links in 1995/vanschnitz

1995/vanschnitz/index.html

@@ -470,7 +470,7 @@ the resulting program (on a Unix system) is to do the command</p>
 solution wherein the disks end up on peg 2; for an even
 number of disks, they will end on peg 3. This should
 provide some hint as to what sort of algorithm is used.</p>
-<p>We have included a <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1995/vanschnitz/spoiler.c">spoiler</a> version of the program, with
+<p>We have included a <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1995/vanschnitz/vanschnitz.alt.c">spoiler</a> version of the program, with
 meaningful symbol names and comments, but we encourage you
 to try to decipher the program without it…</p>
 <pre><code>    begin 444 spoiler.c