fix copyright headers

Author: rashmi-tondare

interceptors/retry/trace_notrace.go

@@ -1,8 +1,8 @@
-//go:build retrynotrace
-
 // Copyright (c) The go-grpc-middleware Authors.
 // Licensed under the Apache License 2.0.
 
+//go:build retrynotrace
+
 package retry
 
 // retrynotrace can be used to avoid importing golang.org/x/net/trace, which in

interceptors/retry/trace_notrace_test.go

@@ -1,8 +1,8 @@
-//go:build retrynotrace
-
 // Copyright (c) The go-grpc-middleware Authors.
 // Licensed under the Apache License 2.0.
 
+//go:build retrynotrace
+
 package retry
 
 import (

interceptors/retry/trace_withtrace.go

@@ -1,8 +1,8 @@
-//go:build !retrynotrace
-
 // Copyright (c) The go-grpc-middleware Authors.
 // Licensed under the Apache License 2.0.
 
+//go:build !retrynotrace
+
 package retry
 
 import (

interceptors/retry/trace_withtrace_test.go

@@ -1,8 +1,8 @@
-//go:build !retrynotrace
-
 // Copyright (c) The go-grpc-middleware Authors.
 // Licensed under the Apache License 2.0.
 
+//go:build !retrynotrace
+
 package retry
 
 import (