Change 'Best of show' to 'Best of Show'

This fixes an inconsistency in case. The spreadsheet in tmp,
year_prize.numbers and the year_prize.csv files were updated also (with
the ./fix_csv.sh run under tmp/).

There was no need to manually update the index.html, any other html
files or .entry.json files as I used sgit(1) to change the case.

2020/index.html

@@ -463,7 +463,7 @@ See also <a href="../faq.html">the IOCCC FAQ</a> for additional information on t
 <p><strong>Download</strong> all <a href="2020/2020.tar.bz2">2020 IOCCC entry source</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="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>