fix broken markdown local links in 2019/poikola/README.md

Ran `bin/readme2index.sh -v 1 2019/poikola` to perform the above.

2019/poikola/README.md

@@ -162,7 +162,7 @@ White](https://www.glyphweb.com/arda/g/gandalf.html) and the [Judges of
 the IOCCC](../../judges.html).
 
 Output of `iocccsize`, using the [2019 version of
-iocccsize](%%REPO_URL%%/2019/poikola/iocccsize.c), is carefully selected.  For
+iocccsize](%%REPO_URL%%/2019/iocccsize.c), is carefully selected.  For
 the sake of clarity, I used single letter variables in the code. I also avoided
 unnecessary use of functions.  Like a
 [tripundra](https://en.wikipedia.org/wiki/Tripundra), this program has three

2019/poikola/index.html

@@ -474,7 +474,7 @@ who passed away on fourth of February 2019.</p>
 <p>So, I followed the rules given by <a href="https://www.glyphweb.com/arda/g/gandalf.html">Gandalf the
 White</a> and the <a href="../../judges.html">Judges of
 the IOCCC</a>.</p>
-<p>Output of <code>iocccsize</code>, using the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/poikola/iocccsize.c">2019 version of
+<p>Output of <code>iocccsize</code>, using the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/iocccsize.c">2019 version of
 iocccsize</a>, is carefully selected. For
 the sake of clarity, I used single letter variables in the code. I also avoided
 unnecessary use of functions. Like a