add a label to signal that a deploy is connected with a recipe (!264)

Resolves coop-cloud/organising#391 by adding the following label `coop-cloud.${STACK_NAME}.recipe=${RECIPE}` (according to the version label).
This is required for the auto updater coop-cloud/organising#236 (comment)

Co-authored-by: Moritz <moritz.m@local-it.org>
Reviewed-on: coop-cloud/abra#264

cli/app/rollback.go

@@ -179,6 +179,7 @@ recipes.
 			logrus.Fatal(err)
 		}
 		config.ExposeAllEnv(stackName, compose, app.Env)
+		config.SetRecipeLabel(compose, stackName, app.Recipe)
 
 		if !internal.Force {
 			if err := internal.NewVersionOverview(app, deployedVersion, chosenDowngrade, ""); err != nil {