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

2004/burley/index.html

@@ -192,7 +192,7 @@ the program so this “strategy” no longer works?</p>
 of what state is being saved and restored?</p>
 <p>NOTE: the author talks about how it is a single statement. This might not be
 strictly true in 2023 for the fixes for it to work so you can look at the
-original file <a href="burley.orig.c">burley.orig.c</a> to see what is meant.</p>
+original file <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2004/burley/burley.orig.c">burley.orig.c</a> to see what is meant.</p>
 <h2 id="authors-remarks">Author’s remarks:</h2>
 <p>This program plays draw poker. What is unusual about it is that it
 is written as a single statement – count the semicolons! (OK, there