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

1992/kivinen/index.html

@@ -191,7 +191,7 @@ you have with the program. :-)</p>
 Such systems should compile using <code>-lX11</code>.</p>
 <p>NOTE: The original winning source <a href="kivinen.orig.c">kivinen.orig.c</a> assumed that
 <code>exit(3)</code> returned a value which cause problems for some systems where <code>exit(3)</code> returns
-<code>void</code>. The file <a href="kivinen.c">kivinen.c</a> avoids this problem.</p>
+<code>void</code>. The file <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/kivinen/kivinen.c">kivinen.c</a> avoids this problem.</p>
 <h2 id="authors-remarks">Author’s remarks:</h2>
 <h3 id="x-entertainment-kit">X Entertainment Kit</h3>
 <p>This kit includes three games from the early era of video games designed for