Update strategies count to 4 (#39610)

## Bug

- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`

## Documentation / Examples

- [ ] Make sure the linting passes by running `pnpm lint`
- [ ] The examples guidelines are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing.md#adding-examples)

docs/basic-features/script.md

@@ -65,7 +65,7 @@ With `next/script`, you decide when to load your third-party script by using the
 <Script src="https://connect.facebook.net/en_US/sdk.js" strategy="lazyOnload" />
 ```
 
-There are three different loading strategies that can be used:
+There are four different loading strategies that can be used:
 
 - `beforeInteractive`: Load before the page is interactive
 - `afterInteractive`: (**default**) Load immediately after the page becomes interactive