`unmanaged` types should include `nint` and `nuint`

[just-ero]

The "Unmanaged types (C# reference)" page currently does not include the unmanaged native types nint and nuint. They are blittable, unmanaged types and should therefore be included.

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Document Details

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• ID: 93e5d75f-07a3-e7ee-2842-ac754bdd2e41
• Version Independent ID: 4a3622fb-7d09-78ec-ba38-b88001475018
• Content: Unmanaged types - C# reference
• Content Source: docs/csharp/language-reference/builtin-types/unmanaged-types.md
• Product: dotnet-csharp
• Technology: csharp-language-reference
• GitHub Login: @BillWagner
• Microsoft Alias: wiwagn

[BillWagner]

Fixed in #34311