Update src/librustdoc/html/static/js/main.js

Co-authored-by: Guillaume Gomez <[email protected]>

Author: notriddle

src/librustdoc/html/static/js/main.js

@@ -1710,7 +1710,7 @@ function preLoadCss(cssUrl) {
             // @ts-expect-error
             document.getElementById("main-content").appendChild(help_section);
         } else {
-            onEachLazy(document.querySelectorAll(".help-menu"), menu => {
+            onEachLazy(document.getElementsByClassName("help-menu"), menu => {
                 if (menu.offsetWidth !== 0) {
                     menu.appendChild(container);
                     container.onblur = helpBlurHandler;