File preamble ordering

Author: nblumhardt

src/Serilog.Sinks.Async/Sinks/Async/IAsyncLogEventSinkMonitor.cs

@@ -1,5 +1,4 @@
-namespace Serilog.Sinks.Async;
-// Copyright © Serilog Contributors
+// Copyright © Serilog Contributors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -13,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+namespace Serilog.Sinks.Async;
+
 /// <summary>
 /// Defines a mechanism for the Async Sink to afford Health Checks a buffer metadata inspection mechanism.
 /// </summary>