FileStream constructor documentation incorrectly states that bufferSize: 0 throws

[igor-mq-team]

Describe the issue or suggestion

For FileStream(string, FileMode, FileAccess, FileShare, int, FileOptions),
the .NET 10 documentation says that bufferSize must be greater than zero
and that zero throws ArgumentOutOfRangeException.

The .NET 10 runtime source disagrees:

• FileStreamHelpers.ValidateArguments rejects only bufferSize < 0:
  https://github.com/dotnet/runtime/blob/release/10.0/src/libraries/System.Private.CoreLib/src/System/IO/Strategies/FileStreamHelpers.cs#L79-L82
• buffering is enabled only when bufferSize > 1:
  https://github.com/dotnet/runtime/blob/release/10.0/src/libraries/System.Private.CoreLib/src/System/IO/Strategies/FileStreamHelpers.cs#L30-L31

Therefore bufferSize: 0 is valid and disables the internal buffering strategy.
Please correct the parameter description and ArgumentOutOfRangeException documentation.

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