extractrc: Fix double-unescaping of `"`

extractrc

@@ -144,8 +144,8 @@ sub unescape_xml ($) {
     if (not $opt_no_unescape_xml) {
         $text =~ s/&lt;/</g;
         $text =~ s/&gt;/>/g;
-        $text =~ s/&amp;/&/g;
         $text =~ s/&quot;/"/g;
+        $text =~ s/&amp;/&/g;
     }
 
     return $text;