change references to post Great Fork Merge URLs

In preparation for the **Great Fork Merge**:

We change references for the repo from
`https://github.com/ioccc-src/temp-test-ioccc`
to `https://github.com/ioccc-src/winner`.

We change references for the web site from
`https://ioccc-src.github.io/temp-test-ioccc`
to `https://github.com/ioccc-src/winner`.

NOTE: There will be a **LOT OF LINKS BROKEN**, because of the changes
to the REPO URL and the WEBSITE URL, until the **Great Fork Merge**
updates the+[official IOCCC website](https://www.ioccc.org).

markdown.html

@@ -412,7 +412,7 @@
 <!-- START: this line starts content from: inc/navbar.empty.html -->
 
 <div class="navbar">
-<a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2Fmarkdown.html">&#x2713;</a>
+<a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.ioccc.org%2Fmarkdown.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.empty.html -->
@@ -872,7 +872,7 @@ best you can.
 
     <div id="coda"><h3>Coda</h3>
 	<p>
-	<a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2Fmarkdown.html" rel="nofollow">Nu HTML check this web page</a><br>
+	<a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.ioccc.org%2Fmarkdown.html" rel="nofollow">Nu HTML check this web page</a><br>
 	<a href="#top">Jump to top</a> <a href="#content">Jump to Content</a>
 	</p>
     </div>