RestClient default headers missing from RestResponse.Request.Parameters

[jrod567]

Describe the bug
RestClient default headers added to the RestClient are not included in RestRsponse.Request.Parameters collection when using RestClient.AddDefaultHeader method

To Reproduce

RestClient restClient = new RestClient("https://swapi.dev/api");
restClient.AddDefaultHeader("Authorization", "1234");
RestRequest rq = new RestRequest("/films", Method.Get);
RestResponse rs = restClient.Execute(rq); `

Expected behavior
RestClient default headers should be included in the RestResponse.Request.Parameters collection

Stack trace
No exceptions; just missing data

Desktop (please complete the following information):

• OS: Windows
• .NET 6
• RestSharp v112