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

1990/stig/README.md

@@ -23,7 +23,7 @@ NOTE: that's not a typo or mistake but one can also do:
 We changed the alias that the author's suggested alias from a
 C-shell alias to a Bourne-like shell alias.
 
-Note that `shst.c` is renamed to [stig.c](stig.c) in the distribution.
+Note that `shst.c` is renamed to [stig.c](%%REPO_URL%%/1990/stigstig.c) in the distribution.
 
 WARNING: This program's `how to compile` is too specific to a particular shell.
 The obfuscation of this program is more related to shell obfuscation than C

1990/stig/index.html

@@ -161,7 +161,7 @@ Location: <a href="../../location.html#NO">NO</a> - <em>Kingdom of Norway</em> (
 <h2 id="judges-remarks">Judges’ remarks:</h2>
 <p>We changed the alias that the author’s suggested alias from a
 C-shell alias to a Bourne-like shell alias.</p>
-<p>Note that <code>shst.c</code> is renamed to <a href="stig.c">stig.c</a> in the distribution.</p>
+<p>Note that <code>shst.c</code> is renamed to <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1990/stigstig.c">stig.c</a> in the distribution.</p>
 <p>WARNING: This program’s <code>how to compile</code> is too specific to a particular shell.
 The obfuscation of this program is more related to shell obfuscation than C
 obfuscation. This type of entry will not be permitted in future contests.</p>