♿️(frontend) hide under construction banner icon from screen readers

Add aria-hidden="true" attribute to the "site under construction" banner icon
to prevent it from being announced by screen readers. Improves accessibility
by avoiding unnecessary and potentially confusing vocalization

src/frontend/src/components/FeedbackBanner.tsx

@@ -24,7 +24,7 @@ export const FeedbackBanner = () => {
           alignItems: 'center',
         })}
       >
-        <RiErrorWarningLine size={20} />
+        <RiErrorWarningLine size={20} aria-hidden="true" />
         <Text as="p">{t('feedback.context')}</Text>
         <div
           className={css({