chore: reword again

output/_layouts/default.html

@@ -49,9 +49,9 @@
         <strong>Something’s gone wrong.</strong> There are currently no notes to show. We’re investigating.
       </div>
     {% elsif site.data.meta.total_fetched < site.data.meta.total_tweets %}
-      {% assign perc_fetched = site.data.meta.total_fetched | times: 100 | divided_by: site.data.meta.total_tweets %}
+      {% assign perc_unfetched = site.data.meta.total_fetched | times: -100 | divided_by: site.data.meta.total_tweets | plus:100 %}
       <div class="alert alert-warning" role="alert">
-        <strong>Only {{ perc_fetched }}% of tweets are currently indexed.</strong> Unindexed tweets are not included in search or filtering. <em><a class="alert-link" href="{{ '/about/#tweet-indexing-status' | relative_url }}">More…</a></em>
+        <strong>Tweets are currently being indexed.</strong> The {{ perc_unfetched }}% of unindexed tweets will not be included in search or filtering. <em><a class="alert-link" href="{{ '/about/#tweet-indexing-status' | relative_url }}">More…</a></em>
       </div>
     {% endif %}