fix many internal links

Fixed a number of internal links that need to
go to the GitHub site.

Ran `make www` to perform the above.

2020/kurdyukov2/index.html

@@ -444,7 +444,7 @@ vertically to get the minimum difference.</p>
 <p>You can use this command to make a GIF from output images (uses ImageMagick).
 For instance after running the command suggested by the judges:</p>
 <pre><code>    convert -delay 10 -dither none -loop 0 $(find . -maxdepth 1 -type f -name &#39;*jpg&#39; | sort -V) $(find . -maxdepth 1 -type f -name &#39;*jpg&#39; | sort -rV) +map out.gif</code></pre>
-<p>NOTE: the above is done in the <a href="try.sh">try.sh</a> script.</p>
+<p>NOTE: the above is done in the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2020/kurdyukov2/try.sh">try.sh</a> script.</p>
 <p>Also provided <code>makegif.sh</code> to aid with GIF creation.</p>
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