Fix linter warnings

internal/daemon/controller/testing.go

@@ -44,6 +44,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/stretchr/testify/require"
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
 	"google.golang.org/grpc/test/bufconn"
 )
 
@@ -978,7 +979,7 @@ func startTestGreeterService(t testing.TB, greeter interceptor.GreeterServiceSer
 
 	conn, _ := grpc.DialContext(dialCtx, "", grpc.WithContextDialer(func(context.Context, string) (net.Conn, error) {
 		return listener.Dial()
-	}), grpc.WithInsecure())
+	}), grpc.WithTransportCredentials(insecure.NewCredentials()))
 
 	t.Cleanup(func() {
 		listener.Close()