[Client bug]: InnerError uses wrong case to serialize/deserialize date field

[olivermue]

Describe the bug
When Graph returns an error it contains an Error and an InnerError. This InnerError has a date field when the error happened. This field is within the SDK marked as Date, but it must be date. Otherwise the field won't be populated and must be read from the AdditionalData dictionary.

        public virtual IDictionary<string, Action<IParseNode>> GetFieldDeserializers() {
            return new Dictionary<string, Action<IParseNode>> {
                {"client-request-id", n => { ClientRequestId = n.GetStringValue(); } },
                {"Date", n => { Date = n.GetDateTimeOffsetValue(); } }, // 👈🏻 wrong case
                {"@odata.type", n => { OdataType = n.GetStringValue(); } },
                {"request-id", n => { RequestId = n.GetStringValue(); } },
            };
        }

        public virtual IDictionary<string, Action<IParseNode>> GetFieldDeserializers() {
            return new Dictionary<string, Action<IParseNode>> {
                {"client-request-id", n => { ClientRequestId = n.GetStringValue(); } },
                {"date", n => { Date = n.GetDateTimeOffsetValue(); } }, // 👈🏻 correct case
                {"@odata.type", n => { OdataType = n.GetStringValue(); } },
                {"request-id", n => { RequestId = n.GetStringValue(); } },
            };
        }

https://github.com/microsoftgraph/msgraph-sdk-dotnet/blob/d0ed65c90cd5fd5fd22fe8b3ea4e420036e2f1b1/src/Microsoft.Graph/Generated/Models/ODataErrors/InnerError.cs#L85C21-L85C21

[andrueastman]

Thanks for raising this @olivermue .

This is a metadata issue that should be resolved via #2262