JavaScript - Find external link anchor tag and replace html content

ExternalLinkAnchorReplacer.js

var regex = /<a(.+?(?=href))href="((http|https):\/\/(?!www.techmuzz.com)[\w\.\/\-=?#]+)"(.*?)>(.*?)<\/a>/g;
var replaceAnchor = '<a$1href="$2"$4>$5 <img src="https://techmuzz.com/favicon.ico"></a>';

var htmlElement = jQuery('.entry-content');
var updatedHtml = htmlElement.html().replace(regex, replaceAnchor);

htmlElement.replaceWith(updatedHtml);