fix: filter out image placeholder

lib/routes/technologyreview/index.js

@@ -19,6 +19,7 @@ module.exports = async (ctx) => {
                         $('.related__wrap').remove();
                         $('aside').remove();
                         $('svg.monogramTLogo').remove();
+                        $('.image__placeholder--1CF-F').remove();
 
                         const description = ($('.contentHeader__image--1pFzw').html() || $('.contentHeader--fullBleed__image--2jdH0').html() || '') + ($('.contentHeader__deck--3A9FE').html() || '') + $('#content--body').html();
                         const author = $('.byline__name--2MpUW').clone().children().remove().end().text();