style: adjust import lines for golangci-run

Signed-off-by: Jesse Simpson <jesse.simpson36@gmail.com>

pkg/registry/client_test.go

@@ -18,10 +18,11 @@ package registry
 
 import (
 	"context"
-	"github.com/stretchr/testify/assert"
 	"io"
 	"testing"
 
+	"github.com/stretchr/testify/assert"
+
 	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
 	"github.com/stretchr/testify/require"
 	"oras.land/oras-go/v2/content/memory"