fix thanks-for-help.html that was built by make www

Perhaps we need a test, run under `make test`, to look for
cases where 'foo.html' is older than 'foo.md` or where
`index.html` is older than `README.md`, etc. ???

thanks-for-help.html

@@ -4202,6 +4202,9 @@ unobfuscated version that Cody added in, with thanks to Anthony! As the author
 had already provided an alternate version (which was actually the original
 entry), this was put in <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2015/howe/prog.alt2.c">prog.alt2.c</a>. This
 addition prompted the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2015/howe/try.alt.sh">try.alt.sh</a> script.</p>
+<p>The fact there are alternate versions necessitated the
+<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2015/howe/prog.alt-test.sh">prog.alt-test.sh</a> which Cody added as
+well.</p>
 <div id="2015_mills1">
 <h2 id="winning-entry-2015mills1">Winning entry: <a href="2015/mills1/index.html">2015/mills1</a></h2>
 <h3 id="winning-entry-source-code-prog.c-19">Winning entry source code: <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2015/mills1//prog.c">prog.c</a></h3>