auth0.widget: fix reference to auth0-js (#40562)
auth0.widget: fix reference to auth0-js (#40562)

It would like to reference v7, but it does so with a triple slash
reference:

```ts
/// <reference types="auth0-js/v7" />
```

This reference doesn't work in the shipped version of auth0.widget.
The full fix for this is to all package.json references to
`@types/auth0-js@7`, but this isn't needed to fix this particular
problem because just referring to the current version works fine:

```ts
/// <reference types="auth0-js" />
```
dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,markogresak/DefinitelyTyped,mcliment/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped