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

2020/ferguson2/index.html

@@ -818,7 +818,7 @@ email but I’m more likely to respond to mastodon messages.</p>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/Makefile">Makefile</a> - entry Makefile</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/prog.alt.c">prog.alt.c</a> - alternative source</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/prog.orig.c">prog.orig.c</a> - original source</li>
-<li><a href="chocolate-cake.html">chocolate-cake.html</a> - encrypted chocolate cake recipe</li>
+<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/encrypted.html">encrypted.html</a> - secret message in a html file to decrypt</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/input.txt">input.txt</a> - sample input</li>
 <li><a href="obfuscation.html">obfuscation.html</a> - about the obfuscation of this entry</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/obfuscation.txt">obfuscation.txt</a> - sample input</li>
@@ -837,11 +837,8 @@ email but I’m more likely to respond to mastodon messages.</p>
 <ul>
 <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/ferguson2/README.md">README.md</a> - markdown source for index.html</li>
-<li><a href="cake.jpg">cake.jpg</a> - image for chocolate cake</li>
-<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/chocolate-cake.md">chocolate-cake.md</a> - markdown source for chocolate-cake.html</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/.entry.json">.entry.json</a> - description of entry in JSON</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
-<li><a href="ioccc-cake.jpg">ioccc-cake.jpg</a> - image for chocolate cake</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/obfuscation.md">obfuscation.md</a> - markdown source for obfuscation.html</li>
 <li><a href=".path">.path</a> - directory path from top directory</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/ferguson2/recode.md">recode.md</a> - markdown source for recode.html</li>