Improve bin/output-year-index.sh

Make it consistent with my improvement to bin/gen-years.sh: the entry
awards in the links (to each entry) are now in bold and so are the link
names. This helps them stand out a bit more.

1984/index.html

@@ -429,10 +429,10 @@ See also <a href="../faq.html">the IOCCC FAQ</a> for additional information on t
 </div>
 <p><a href="1984.tar.bz2"><strong>Download all winning entries from 1984</strong></a></p>
 <ul>
-<li><a href="anonymous/index.html">1984/anonymous</a> - Dishonorable Mention</li>
-<li><a href="decot/index.html">1984/decot</a> - Second Place</li>
-<li><a href="laman/index.html">1984/laman</a> - Third Place</li>
-<li><a href="mullender/index.html">1984/mullender</a> - Grand Prize</li>
+<li><a href="anonymous/index.html"><strong>1984/anonymous</strong></a> - <strong>Dishonorable Mention</strong></li>
+<li><a href="decot/index.html"><strong>1984/decot</strong></a> - <strong>Second Place</strong></li>
+<li><a href="laman/index.html"><strong>1984/laman</strong></a> - <strong>Third Place</strong></li>
+<li><a href="mullender/index.html"><strong>1984/mullender</strong></a> - <strong>Grand Prize</strong></li>
 </ul>
 <hr style="width:10%;text-align:left;margin-left:0">
 <h4>