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.

1987/index.html

@@ -442,13 +442,13 @@ See also <a href="../faq.html">the IOCCC FAQ</a> for additional information on t
 </div>
 <p><a href="1987.tar.bz2"><strong>Download all winning entries from 1987</strong></a></p>
 <ul>
-<li><a href="biggar/index.html">1987/biggar</a> - Best abuse of the rules</li>
-<li><a href="heckbert/index.html">1987/heckbert</a> - Best obfuscator of programs</li>
-<li><a href="hines/index.html">1987/hines</a> - Worst style</li>
-<li><a href="korn/index.html">1987/korn</a> - Best one liner</li>
-<li><a href="lievaart/index.html">1987/lievaart</a> - Grand Prize</li>
-<li><a href="wall/index.html">1987/wall</a> - Most useful obfuscation</li>
-<li><a href="westley/index.html">1987/westley</a> - Best layout</li>
+<li><a href="biggar/index.html"><strong>1987/biggar</strong></a> - <strong>Best abuse of the rules</strong></li>
+<li><a href="heckbert/index.html"><strong>1987/heckbert</strong></a> - <strong>Best obfuscator of programs</strong></li>
+<li><a href="hines/index.html"><strong>1987/hines</strong></a> - <strong>Worst style</strong></li>
+<li><a href="korn/index.html"><strong>1987/korn</strong></a> - <strong>Best one liner</strong></li>
+<li><a href="lievaart/index.html"><strong>1987/lievaart</strong></a> - <strong>Grand Prize</strong></li>
+<li><a href="wall/index.html"><strong>1987/wall</strong></a> - <strong>Most useful obfuscation</strong></li>
+<li><a href="westley/index.html"><strong>1987/westley</strong></a> - <strong>Best layout</strong></li>
 </ul>
 <hr style="width:10%;text-align:left;margin-left:0">
 <h4>