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).

2019/yang/index.html

@@ -284,7 +284,7 @@ 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/2019/yang/prog.c">prog.c</a>
-- winning source</li>
+- entry source</li>
 <li><a
 href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/yang/Makefile">Makefile</a>
 - entry Makefile</li>
@@ -304,7 +304,7 @@ href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/yang/try.sh"
 href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/yang/violet.c">violet.c</a>
 - source formatter as ASCII Violet Evergarden</li>
 <li><a href="spoiler.html">spoiler.html</a> - SPOILER WARNING</li>
-<li><a href="2019_yang.tar.bz2">2019_yang.tar.bz2</a> - download winning
+<li><a href="2019_yang.tar.bz2">2019_yang.tar.bz2</a> - download entry
 source</li>
 </ul>
 <h2 id="secondary-files">Secondary files</h2>