[dotnet] Add back in a public parameterless constructor to HttpRequestData

Author: RenderMichael

dotnet/src/webdriver/HttpRequestData.cs

@@ -28,6 +28,16 @@ namespace OpenQA.Selenium
     /// </summary>
     public class HttpRequestData
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="HttpRequestData"/> type.
+        /// </summary>
+        public HttpRequestData()
+        {
+            this.Method = null!;
+            this.Url = null!;
+            this.Headers = null!;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="HttpRequestData"/> type.
         /// </summary>
@@ -68,6 +78,6 @@ public HttpRequestData(string method, string url, string? postData, Dictionary<s
         /// <summary>
         /// Gets the ID of the HTTP request.
         /// </summary>
-        public string RequestId { get; }
+        public string? RequestId { get; }
     }
 }