update validation according to tektoncd#5053

pkg/apis/pipeline/v1beta1/workspace_validation.go

@@ -20,6 +20,7 @@ import (
 	"context"
 
 	"github.com/tektoncd/pipeline/pkg/apis/config"
+	"github.com/tektoncd/pipeline/pkg/apis/version"
 	"k8s.io/apimachinery/pkg/api/equality"
 	"knative.dev/pkg/apis"
 )
@@ -70,7 +71,7 @@ func (b *WorkspaceBinding) Validate(ctx context.Context) (errs *apis.FieldError)
 	// The csi workspace is only supported when the alpha feature gate is enabled.
 	// For a CSI to work, you must provide and have installed the driver to use.
 	if b.CSI != nil {
-		errs := ValidateEnabledAPIFields(ctx, "csi workspace type", config.AlphaAPIFields).ViaField("workspaces")
+		errs := version.ValidateEnabledAPIFields(ctx, "csi workspace type", config.AlphaAPIFields).ViaField("workspaces")
 		if errs != nil {
 			return errs
 		}