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.

2020/index.html

@@ -462,21 +462,21 @@ See also <a href="../faq.html">the IOCCC FAQ</a> for additional information on t
 </div>
 <p><a href="2020.tar.bz2"><strong>Download all winning entries from 2020</strong></a></p>
 <ul>
-<li><a href="burton/index.html">2020/burton</a> - Best one liner</li>
-<li><a href="carlini/index.html">2020/carlini</a> - Best of Show - abuse of libc</li>
-<li><a href="endoh1/index.html">2020/endoh1</a> - Most explosive</li>
-<li><a href="endoh2/index.html">2020/endoh2</a> - Best perspective</li>
-<li><a href="endoh3/index.html">2020/endoh3</a> - Most head-turning</li>
-<li><a href="ferguson1/index.html">2020/ferguson1</a> - Don’t tread on me award</li>
-<li><a href="ferguson2/index.html">2020/ferguson2</a> - Most enigmatic</li>
-<li><a href="giles/index.html">2020/giles</a> - Most phony</li>
-<li><a href="kurdyukov1/index.html">2020/kurdyukov1</a> - Best utility</li>
-<li><a href="kurdyukov2/index.html">2020/kurdyukov2</a> - Least detailed</li>
-<li><a href="kurdyukov3/index.html">2020/kurdyukov3</a> - Bset slaml prragom</li>
-<li><a href="kurdyukov4/index.html">2020/kurdyukov4</a> - Best abuse of lámatyávë</li>
-<li><a href="otterness/index.html">2020/otterness</a> - Most percussive</li>
-<li><a href="tsoj/index.html">2020/tsoj</a> - Most misleading indentation</li>
-<li><a href="yang/index.html">2020/yang</a> - Best abuse of CPP</li>
+<li><a href="burton/index.html">2020/burton</a> - <strong>Best one liner</strong></li>
+<li><a href="carlini/index.html">2020/carlini</a> - <strong>Best of Show - abuse of libc</strong></li>
+<li><a href="endoh1/index.html">2020/endoh1</a> - <strong>Most explosive</strong></li>
+<li><a href="endoh2/index.html">2020/endoh2</a> - <strong>Best perspective</strong></li>
+<li><a href="endoh3/index.html">2020/endoh3</a> - <strong>Most head-turning</strong></li>
+<li><a href="ferguson1/index.html">2020/ferguson1</a> - <strong>Don’t tread on me award</strong></li>
+<li><a href="ferguson2/index.html">2020/ferguson2</a> - <strong>Most enigmatic</strong></li>
+<li><a href="giles/index.html">2020/giles</a> - <strong>Most phony</strong></li>
+<li><a href="kurdyukov1/index.html">2020/kurdyukov1</a> - <strong>Best utility</strong></li>
+<li><a href="kurdyukov2/index.html">2020/kurdyukov2</a> - <strong>Least detailed</strong></li>
+<li><a href="kurdyukov3/index.html">2020/kurdyukov3</a> - <strong>Bset slaml prragom</strong></li>
+<li><a href="kurdyukov4/index.html">2020/kurdyukov4</a> - <strong>Best abuse of lámatyávë</strong></li>
+<li><a href="otterness/index.html">2020/otterness</a> - <strong>Most percussive</strong></li>
+<li><a href="tsoj/index.html">2020/tsoj</a> - <strong>Most misleading indentation</strong></li>
+<li><a href="yang/index.html">2020/yang</a> - <strong>Best abuse of CPP</strong></li>
 </ul>
 <hr style="width:10%;text-align:left;margin-left:0">
 <h4>