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

1998/schweikh1/index.html

@@ -219,7 +219,7 @@ itself. Just load it in your favorite editor.</p>
 <h3 id="requirements">Requirements</h3>
 <p><code>gcc</code> (the GNU C compiler) must be available at runtime. It is assumed that your
 C implementation keeps headers as files in the <code>/usr/include</code> directory. The
-<a href="info">info</a> file must be readable and reside in the current working directory.
+<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1998/schweikh1/info">info</a> file must be readable and reside in the current working directory.
 The current working directory must be writable in order to create a temporary
 file (which is removed upon program termination). In case you don’t have gcc at
 runtime, not all is lost if your compiler or preprocessor can produce a list of