profiling creates threads; don't run it in parallel

StackExchange.Redis.Tests/Profiling.cs

@@ -10,6 +10,7 @@
 
 namespace StackExchange.Redis.Tests
 {
+    [Collection(NonParallelCollection.Name)]
     public class Profiling : TestBase
     {
         public Profiling(ITestOutputHelper output) : base(output) { }