[docs] Icons aren't searchable anymore in Algolia

[Janpot]

See #41330 (comment)

Icons used to be searchable in v4

But even after reverting the icons virtualization, they still aren't searchable.

Search keywords:

[oliviertassinari]

It used to work before because of the DOM structure match the crawler

https://v4.mui.com/components/material-icons/

vs.

https://dashboard.algolia.com/apps/TZGZ85B9TB/crawler/crawler/739c29c8-99ea-4945-bd27-17a1df391902/editor

So this should help:

diff --git a/docs/data/material/components/material-icons/SearchIcons.js b/docs/data/material/components/material-icons/SearchIcons.js
index 945dcc038f..ac636e7acd 100644
--- a/docs/data/material/components/material-icons/SearchIcons.js
+++ b/docs/data/material/components/material-icons/SearchIcons.js
@@ -200,7 +200,7 @@ function Icon(props) {
         <div className={SVG_ICON_CLASS} />
       )}
       {/* eslint-disable-next-line jsx-a11y/no-static-element-interactions -- TODO: a11y */}
-      <div onClick={handleLabelClick}>{icon.importName}</div>
+      <div className="algolia-content" onClick={handleLabelClick}>{icon.importName}</div>
       {/* eslint-enable jsx-a11y/click-events-have-key-events */}
     </StyledIcon>
   );

Another challenge might be: https://docsearch.algolia.com/docs/record-extractor/#reduce-the-number-of-records.