Add new ESLint rule requiring explicit button types (#36738)

app/javascript/mastodon/features/notifications/components/filtered_notifications_banner.tsx

@@ -45,6 +45,7 @@ export const FilteredNotificationsIconButton: React.FC<{
       title={intl.formatMessage(messages.filteredNotifications)}
       onClick={handleClick}
       className={className}
+      type='button'
     >
       <Icon id='filtered-notifications' icon={InventoryIcon} />
     </button>