update index.html and .entry.json per recent manifest changes

Every index.html file (for entries) was updated as the tarball download
description was changed to 'download entry source' (though I think this
is a mistake as the C file is described as 'entry source' so it's
ambiguous - that might be fixed soon or it mightn't be until some other
changes are made that need a manifest update).

2020/giles/index.html

@@ -278,7 +278,7 @@ https://creativecommons.org/licenses/by-sa/4.0/</p>
 <li><a href="index.html">index.html</a> - entry home page</li>
 <li><a
 href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/giles/prog.c">prog.c</a>
-- winning source</li>
+- entry source</li>
 <li><a
 href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/giles/Makefile">Makefile</a>
 - entry Makefile</li>
@@ -290,8 +290,8 @@ href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/giles/try.sh
 - how to run</li>
 <li><a href="pi.wav">pi.wav</a> - touch tone for leading decimal digits
 of pi</li>
-<li><a href="2020_giles.tar.bz2">2020_giles.tar.bz2</a> - download
-winning source</li>
+<li><a href="2020_giles.tar.bz2">2020_giles.tar.bz2</a> - download entry
+source</li>
 </ul>
 <h2 id="secondary-files">Secondary files</h2>
 <ul>