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

1984/mullender/index.html

@@ -549,7 +549,7 @@ href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1984/mullender/mu
 - original source</li>
 <li><a
 href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1984/mullender/a.out.h">a.out.h</a>
-- head file for system who lack it</li>
+- header file for systems that lack it for gentab.c</li>
 <li><a
 href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1984/mullender/gentab.c">gentab.c</a>
 - author tool to create constants</li>