Minor: name pipeline_v1 import to match rest of SDK. (#14775)

diff --git a/sdks/go/pkg/beam/core/runtime/xlangx/payload.go b/sdks/go/pkg/beam/core/runtime/xlangx/payload.go
index c038463..cdb3457 100644
--- a/sdks/go/pkg/beam/core/runtime/xlangx/payload.go
+++ b/sdks/go/pkg/beam/core/runtime/xlangx/payload.go
@@ -19,10 +19,10 @@
 	"bytes"
 	"reflect"
 
+	pipepb "github.com/apache/beam/sdks/go/pkg/beam/model/pipeline_v1"
 	"github.com/apache/beam/sdks/go/pkg/beam/core/graph/coder"
 	"github.com/apache/beam/sdks/go/pkg/beam/core/runtime/graphx/schema"
 	"github.com/apache/beam/sdks/go/pkg/beam/internal/errors"
-	"github.com/apache/beam/sdks/go/pkg/beam/model/pipeline_v1"
 	"google.golang.org/protobuf/proto"
 )
 
@@ -53,7 +53,7 @@
 	}
 
 	// Put schema and row into payload proto, and marshal it.
-	ecp := &pipeline_v1.ExternalConfigurationPayload{
+	ecp := &pipepb.ExternalConfigurationPayload{
 		Schema:  scm,
 		Payload: buf.Bytes(),
 	}