fix internal links in entry index.html from 1984 thru 2012

1993/schnitzi/index.html

@@ -182,7 +182,7 @@ intentional spelling error there.</p>
 <p>After this program prints the contents of ‘file’, ask it
 some questions related to the text.</p>
 <p>The author suggests the following questions when using
-<a href="schnitzi.info">schnitzi.info</a>:</p>
+<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/schnitzi/schnitzi.info">schnitzi.info</a>:</p>
 <ul>
 <li>Who is Mark Schnitzius?</li>
 <li>What exactly does this program do?</li>