build: 10.8.24

fix: 变量离线后再次上线，如果值不变，会导致在线状态不刷新
fix: s7离线恢复时，可能触发多次协议握手导致异常

src/Foundation/ThingsGateway.Foundation/Device/DeviceBase.cs

@@ -404,7 +404,7 @@ public abstract class DeviceBase : DisposableObject, IDevice
             }
             finally
             {
-                await Task.Delay(500, token).ConfigureAwait(false);
+                try { await Task.Delay(500, token).ConfigureAwait(false); } catch { }
                 connectWaitLock.Release();
             }
         }