fix internal links in entry index.html from 1984 thru 2012

2005/vince/index.html

@@ -162,7 +162,7 @@ installed.</p>
 <p>When running this in the program’s window try hitting space a few times and see
 what happens!</p>
 <h2 id="alternate-code">Alternate code:</h2>
-<p>The <a href="vince.alt.c">vince.alt.c</a> code of the submission will run on SGI IRIX and
+<p>The <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2005/vince/vince.alt.c">vince.alt.c</a> code of the submission will run on SGI IRIX and
 also has the recursive <code>CPP</code> macro (which sneaked in accidentally) removed.</p>
 <h3 id="alternate-build">Alternate build:</h3>
 <p>To compile this alternate version:</p>