vendor: update buildkit to master@9624ab4

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

vendor/github.com/docker/cli/cli-plugins/manager/plugin.go

@@ -10,9 +10,7 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var (
-	pluginNameRe = regexp.MustCompile("^[a-z][a-z0-9]*$")
-)
+var pluginNameRe = regexp.MustCompile("^[a-z][a-z0-9]*$")
 
 // Plugin represents a potential plugin with all it's metadata.
 type Plugin struct {
@@ -33,8 +31,6 @@ type Plugin struct {
 // is set, and is always a `pluginError`, but the `Plugin` is still
 // returned with no error. An error is only returned due to a
 // non-recoverable error.
-//
-//nolint:gocyclo
 func newPlugin(c Candidate, rootcmd *cobra.Command) (Plugin, error) {
 	path := c.Path()
 	if path == "" {
@@ -71,7 +67,7 @@ func newPlugin(c Candidate, rootcmd *cobra.Command) (Plugin, error) {
 			// Ignore conflicts with commands which are
 			// just plugin stubs (i.e. from a previous
 			// call to AddPluginCommandStubs).
-			if p := cmd.Annotations[CommandAnnotationPlugin]; p == "true" {
+			if IsPluginCommand(cmd) {
 				continue
 			}
 			if cmd.Name() == p.Name {