'Convert typeof to nameof' is not offered on types nested in generic types

**Version Used**: 16.8-p2

```cs
using System.Collections.Generic;

Console.WriteLine([||]typeof(List<int>.Enumerator).Name); // Enumerator
```

Actual: no fix offered.

Expected:

```cs
Console.WriteLine(nameof(List<int>.Enumerator)); // Enumerator
```