syn_index.html: Update information about where the website is generated

Now reflects the status quo, conditionally on the DNS updates to perl6.org
and perlcabal.org percolating all through the Internet.

Author: moritz

docs/feather/syn_index.html

@@ -407,7 +407,7 @@ <h2>About this page</h2>
 divided into pieces and inserted after corresponding paragraph of 
 the Synopses.  The job is done by the Perl 5 script util/smartlinks.pl
 living in the <a href="https://github.com/perl6/mu/"
-    title="Perl6 mu repository on Github">mu repository</a>. It runs once every hour, and is triggered by the file <code>docs/feather/script/update-syn</code> in the mu repository. It runs as user <code>pugscode</code> on feather1.</p>
+    title="Perl6 mu repository on Github">mu repository</a>. It runs once every hour, and is triggered by the file <code>util/update-design.perl6.org.sh</code> in the mu repository. It runs as user <code>design.perl6.org</code> on <a href="https://github.com/perl6/infrastructure-doc/blob/master/hosts/www.p6c.org.pod">www.p6c.org</a>.</p>
 
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