update readme

Author: nervenes

README.md

@@ -75,12 +75,12 @@ actor FooService: Service {
 
 @main
 struct Application {
+    static let logger = Logger(label: "Application")
+    
     static func main() async throws {
         let service1 = FooService()
         let service2 = FooService()
 
-        let logger = Logger(label: "Application")
-        
         let serviceGroup = ServiceGroup(
             services: [service1, service2],
             gracefulShutdownSignals: [.sigterm],