If the reference is a url identifier, serialize it as is

Author: MaggieKimani1

src/Microsoft.OpenApi/Models/OpenApiReference.cs

@@ -95,6 +95,10 @@ public string ReferenceV3
                 {
                     return Id;
                 }
+                if (Id.StartsWith("https"))
+                {
+                    return Id;
+                }
 
                 return "#/components/" + Type.GetDisplayName() + "/" + Id;
             }
@@ -236,6 +240,11 @@ private string GetExternalReferenceV3()
                     return ExternalResource + "#" + Id;
                 }
 
+                if (Id.StartsWith("https"))
+                {
+                    return Id;
+                }
+
                 return ExternalResource + "#/components/" + Type.GetDisplayName() + "/" + Id;
             }