Close docker client (#789)

* Close docker client!

* Fix nil dereference

* Update run_context.go

* Bump

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

pkg/container/docker_pull.go

@@ -57,6 +57,7 @@ func NewDockerPullExecutor(input NewDockerPullExecutorInput) common.Executor {
 		if err != nil {
 			return err
 		}
+		defer cli.Close()
 
 		imagePullOptions, err := getImagePullOptions(ctx, input)
 		if err != nil {