fix: make TypeScript 6 bump CI-compatible

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

env.d.ts

@@ -3,6 +3,8 @@
 
 /// <reference types="vite/client" />
 
+declare module 'vite/modulepreload-polyfill'
+
 declare module '@nextcloud/router' {
 	export function generateOcsUrl(path: string, params?: object, options?: object): string
 	export function generateUrl(path: string, params?: object, options?: object): string