Improve summary for threading backend

Author: vchuravy

src/callbacks_step/summary.jl

@@ -209,9 +209,7 @@ function initialize_summary_callback(cb::DiscreteCallback, u, t, integrator;
 
     # technical details
     setup = Pair{String, Any}["#threads" => Threads.nthreads()]
-    if _PREFERENCE_THREADING !== :polyester
-        push!(setup, "Polyester" => "disabled")
-    end
+    push!(setup, "threading backend" => string(_PREFERENCE_THREADING))
     if !_PREFERENCE_LOOPVECTORIZATION
         push!(setup, "LoopVectorization" => "disabled")
     end