does not mention Null permit

C# now supports "#nullable enable" and/or "<Nullable>enable</Nullable>" options but neither are mentioned in this article. Ditto no mention or code example of "?? throw new xyzException"

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* Version Independent ID: c1d3f414-e493-d3a2-6b7c-729ff3fcc53b
* Content: [CA1062: Validate arguments of public methods (code analysis) - .NET](https://docs.microsoft.com/en-us/dotnet/fundamentals/code-analysis/quality-rules/ca1062)
* Content Source: [docs/fundamentals/code-analysis/quality-rules/ca1062.md](https://github.com/dotnet/docs/blob/main/docs/fundamentals/code-analysis/quality-rules/ca1062.md)
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* Microsoft Alias: **gewarren**