Fix mastodon_url in Cody_Boone_Ferguson.json

Rebuilt authors.html.

author/Cody_Boone_Ferguson.json

@@ -10,7 +10,7 @@
     "alt_url" : "https://ioccc.xexyl.net",
     "deprecated_twitter_handle" : null,
     "mastodon" : "@xexyl@fosstodon.org",
-    "mastodon_url" : null,
+    "mastodon_url" : "https://fosstodon.org/@xexyl",
     "github" : "@xexyl",
     "affiliation" : null,
     "winning_entry_set" : [

authors.html

@@ -1657,6 +1657,8 @@ URL: <a class="normal" href="https://xexyl.net">https://xexyl.net</a>
 <br>
 Alternate URL: <a class="normal" href="https://ioccc.xexyl.net">https://ioccc.xexyl.net</a>
 <br>
+Mastodon: <a class="normal" href="https://fosstodon.org/@xexyl"><span class="citation" data-cites="xexyl">@xexyl</span><span class="citation" data-cites="fosstodon.org">@fosstodon.org</span></a>
+<br>
 GitHub: <a class="normal" href="https://github.com/xexyl"><span class="citation" data-cites="xexyl">@xexyl</span></a>
 <br>
 author_handle: <a class="normal" href="https://github.com/ioccc-src/winner/blob/master/author/Cody_Boone_Ferguson.json">Cody_Boone_Ferguson</a>