frfac: loosen regex strictness on mp3 file name

This goes with the rfi's changes causing the change
a couple commits back.

frfac.in

@@ -43,7 +43,7 @@ my $latest_episode = pop @episode_links;
 my @mp3s;
 sub collect_mp3s {
     my ($uri, $uri_text) = @_;
-    push @mp3s, $uri_text if $uri_text =~ /facile_\d+\.mp3$/;
+    push @mp3s, $uri_text if $uri_text =~ /facile_\d+.*\d+\.mp3$/;
 }
 
 $res = URI::Fetch->fetch($latest_episode) or die URI::Fetch->errstr;