Patch typo in docs

docs/src/js/index.js

@@ -61,7 +61,7 @@ $.getJSON("https://api.github.com/repos/niess/python-appimage/releases").done(fu
         for (const release of releases) {
             elements.push(`<a href="${release.url}">${release.version}</a>`)
         }
-        $("#append-releases-list").append(
+        $("#append-releases-list").html(
             " Available Python versions are " +
             elements.slice(0, -1).join(", ") +
             " and " +