IsPrivate is not serialized correctly

[ApiDoussot]

Describe the bug

All issues are created and updated to "Private"
The IsPrivate Property is incorrectly serialized to "False" instead of "false"

Environment (please complete the following information):

• Library version: 4.50
• .NET runtime: [.NET 9.0]
• SerializationType : JSON

Additional context
Method called :

    public T Create<T>(T entity, string ownerId = null, RequestOptions requestOptions = null) 
        where T : class, new()
    {
        var url = RedmineApiUrls.CreateEntityFragment<T>(ownerId);

        var payload = Serializer.Serialize(entity);
        
        var response = ApiClient.Create(url, payload, requestOptions);

        return response.DeserializeTo<T>(Serializer);
    }

payload = {
  "issue": {
    "subject": "Test privé",
    "description": null,
    "notes": null,
    "is_private": "False",
    "project_id": 60,
    "estimated_hours": "",
    "parent_issue_id": null,
    "start_date": "",
    "due_date": "",
    "updated_on": ""
  }
}