Add GCSettings.IsServerGC to the timeout exception

StackExchange.Redis/StackExchange/Redis/ConnectionMultiplexer.cs

@@ -14,6 +14,7 @@
 using Microsoft.Runtime.CompilerServices;
 #else
 using System.Runtime.CompilerServices;
+using System.Runtime;
 #endif
 
 namespace StackExchange.Redis
@@ -1974,6 +1975,7 @@ internal T ExecuteSyncImpl<T>(Message message, ResultProcessor<T> processor, Ser
                             add("Active-Readers", "ar", ar.ToString());
 
                             add("Client-Name", "clientName", ClientName);
+                            add("Server-GC", "serverGC", GCSettings.IsServerGC.ToString());
 #if !CORE_CLR
                             string iocp, worker;
                             int busyWorkerCount = GetThreadPoolStats(out iocp, out worker);