feat: Add French translation (#221)

Conor

2022-10-26 689201bfbde5bd48b001bfa2b54db6a1d5a4aa81

 assets/js/popover.js

@@ -27,7 +27,7 @@
            let splitLink = li.href.split("#")
            let cleanedContent = removeMarkdown(linkDest.content)
            if (splitLink.length > 1) {
              let headingName = splitLink[1].replace(/\-/g, " ")
              let headingName = decodeURIComponent(splitLink[1]).replace(/\-/g, " ")
              let headingIndex = cleanedContent.toLowerCase().indexOf("<b>" + headingName + "</b>")
              cleanedContent = cleanedContent.substring(headingIndex, cleanedContent.length)
            }