Fix exception thrown when tye run is shutting down and event pipe tries to restart.

src/micronetes/Micronetes.Hosting.Diagnostics/DiagnosticsCollector.cs

@@ -197,6 +197,11 @@ namespace Micronetes.Hosting.Diagnostics
                 {
                     break;
                 }
+                // If the process has already exited, a ServerNotAvailableException will be thrown.
+                catch (ServerNotAvailableException)
+                {
+                    break;
+                }
                 catch (Exception ex)
                 {
                     if (!cancellationToken.IsCancellationRequested)
@@ -230,6 +235,10 @@ namespace Micronetes.Hosting.Diagnostics
                     catch (PlatformNotSupportedException)
                     {
                     }
+                    // If the process has already exited, a ServerNotAvailableException will be thrown.
+                    catch (ServerNotAvailableException)
+                    {
+                    }
                 }
 
                 using var _ = cancellationToken.Register(() => StopSession());