docs: Fix the missing "In This Article" section

docs/_template/light-dark-theme/partials/affix.tmpl.partial

@@ -27,7 +27,8 @@
     </div>
     {{/_disableContribution}}
     <nav class="bs-docs-sidebar hidden-print hidden-xs hidden-sm affix" id="affix">
-    <!-- <p><a class="back-to-top" href="#top">Back to top</a><p> -->
+      <h5>{{__global.inThisArticle}}</h5>
+      <div></div>
     </nav>
   </div>
 </div>