Call base constructor for cloning responses object

Author: MaggieKimani1

src/Microsoft.OpenApi/Models/OpenApiResponses.cs

@@ -16,7 +16,7 @@ public OpenApiResponses() { }
         /// <summary>
         /// Initializes a copy of <see cref="OpenApiResponses"/> object
         /// </summary>
-        public OpenApiResponses(OpenApiResponses openApiResponses) { }
-
+        /// <param name="openApiResponses">The <see cref="OpenApiResponses"/></param>
+        public OpenApiResponses(OpenApiResponses openApiResponses) : base(dictionary: openApiResponses) {}
     }
 }