CborWriter.Reset does not clear _currentIndefiniteLengthStringRanges

[vcsjones]

CborWriter.Reset does not clear _currentIndefiniteLengthStringRanges.

A writer that is in convertIndefiniteLengthEncodings mode and has Reset called mid indefinite length encoding will improperly patch the next block of indefinite length encoding when trying to re-encode it as a definite length encoding.

using System.Formats.Cbor;

void Main()
{
   CborWriter writer = new(convertIndefiniteLengthEncodings: true);
// BEGIN
   writer.WriteStartIndefiniteLengthByteString();
   writer.WriteByteString([1, 2, 3]);
   
   writer.Reset();
// END
   writer.WriteStartIndefiniteLengthByteString();
   writer.WriteByteString([1, 2, 3]);
   writer.WriteEndIndefiniteLengthByteString();
   byte[] encoded = writer.Encode();
   Console.WriteLine(Convert.ToHexString(encoded));
}

This will throw for WriteEndIndefiniteLengthByteString. However, if the contents between BEGIN and END are removed entirely, then it will correctly encode.