Misleading wording on how to specify class id when exposing class to COM

It point 8 it says

> Add the [Guid("")] attribute to the class, with the class identifier GUID for the COM class you're implementing. For example, [Guid("9f35b6f5-2c05-4e7f-93aa-ee087f6e7ab6")]. As with the interface GUID, this GUID must be unique since it is the only identifier of this **interface** to COM.

First, it says "interface" near the end of the sentence. It should be "class" here. "interface" was clearly copied from point 5 and here it's misleading.

Second, this step-by-step explanation is so detailed that it's clearly for noobies. Noobies may not know that class id and interface id should better not be the same. It'd be better to add that it "must be unique, because [] and also not be the same as class id above"

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* ID: e0842844-005f-5004-022d-fce7a82daff8
* Version Independent ID: 88ddeba8-3b31-95f4-26b2-4a12a7313b47
* Content: [Exposing .NET Core components to COM](https://docs.microsoft.com/en-us/dotnet/core/native-interop/expose-components-to-com)
* Content Source: [docs/core/native-interop/expose-components-to-com.md](https://github.com/dotnet/docs/blob/main/docs/core/native-interop/expose-components-to-com.md)
* Product: **dotnet-fundamentals**
* GitHub Login: @jkoritzinsky
* Microsoft Alias: **jekoritz**