[SYNC] chore(docs): fix internal links (#4579)

[github-actions]

chore(docs): fix internal links (#4579) (ed16488)

---

+++ b/docs/guide/backend-integration.md
@@ -22,7 +22,7 @@ If you need a custom integration, you can follow the steps in this guide to conf
})
```
-   If you haven't disabled the [module preload polyfill](/config/#polyfillmodulepreload), you also need to import the polyfill in your entry
+   If you haven't disabled the [module preload polyfill](/config/#build-polyfillmodulepreload), you also need to import the polyfill in your entry
```js
// add the beginning of your app entry