Fixes Problem Details casing bug (#59396)

[scottlwalker]

Problem Details casing bug (#59396)

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Summary of the changes (Less than 80 chars)

Fixes bug #59396

Made recommended changes and created unit tests to verify that changes match intended result for traceId.

Fixes #{bug number} (in this specific format)

[scottlwalker]

@dotnet-policy-service agree

[captainsafia]

LGTM! Thanks for making this contribution! 🙇🏽

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src/Http/Http.Extensions/src/DefaultProblemDetailsWriter.cs:59

• The variable name 'tradeIdKeyName' appears to be a typo. It should be renamed to 'traceIdKeyName'.

var tradeIdKeyName = _serializerOptions.PropertyNamingPolicy?.ConvertName("traceId") ?? "traceId";

[scottlwalker]

LGTM! Thanks for making this contribution! 🙇🏽

Sure no problem it was fun!