Update README.md

README.md

@@ -16,11 +16,3 @@ For backend image see https://github.com/eea/eea.docker.plonesaas/tree/freshwate
 * Create a new release of this code via `git tag` command or [Draft new release](https://github.com/eea/freshwater-frontend/releases/new) on Github.
     * A new Docker image is built and released automatically on [DockerHub](https://hub.docker.com/r/eeacms/freshwater-frontend) based on this tag.
     * A new entry is automatically added to [Volto - Freshwater](https://github.com/eea/eea.rancher.catalog/tree/master/templates/volto-freshwater) `EEA Rancher Catalog`
-
-### Upgrade
-
-* Within your Rancher environment click on the `Upgrade available` yellow button next to your stack.
-
-* Confirm the upgrade
-
-* Or roll-back if something went wrong and abort the upgrade procedure.