code: function headerQuickLinkReplacer(fullMatch, openingTag, headerId, remainingHtml, headerText) {
    const link = makeLink(headerId, headerText);
    return `${openingTag} class="quick-link quick-link__container">${link}${remainingHtml}`;
  }
docs: Inserts the accessible quick link before any header tag and updates the header tag
  to be a quick link container.
  
  @param {String} fullMatch - The full match of the quick link regex.
  @param {String} openingTag - This will be everything in the match
  up to the first '>'. So something like: '<h1 id="h1"'
  @param {String} headerId - The header id that was extracted from the openingTag.
  @param {String} remainingHtml - This will be the remaining html after the first '>'
  @param {String} headerText - All the text that is inbetween the opening and closing of the
  header tags.
  @return {String} the string updated with quick link html