Switch from 48px weight 600 material symbol icons to 24px weight 400 icons (#28064)

app/javascript/mastodon/components/column_back_button.tsx

@@ -2,8 +2,7 @@ import { useCallback } from 'react';
 
 import { FormattedMessage } from 'react-intl';
 
-import ArrowBackIcon from '@material-symbols/svg-600/outlined/arrow_back.svg?react';
-
+import ArrowBackIcon from 'mastodon/../material-icons/400-24px/arrow_back.svg?react';
 import { Icon } from 'mastodon/components/icon';
 import { ButtonInTabsBar } from 'mastodon/features/ui/util/columns_context';