docs(README.md): update for end of maintenance

Author: mboersma

README.md

@@ -1,8 +1,9 @@
 
-|![](https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Warning.svg/156px-Warning.svg.png) | Deis Workflow will soon no longer be maintained.<br />Please [read the announcement](https://deis.com/blog/2017/deis-workflow-final-release/) for more detail. |
+|![](https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Warning.svg/156px-Warning.svg.png) | Deis Workflow is no longer maintained.<br />Please [read the announcement](https://deis.com/blog/2017/deis-workflow-final-release/) for more detail. |
 |---:|---|
 | 09/07/2017 | Deis Workflow [v2.18][] final release before entering maintenance mode |
 | 03/01/2018 | End of Workflow maintenance: critical patches no longer merged |
+| | [Hephy](https://github.com/teamhephy/workflow) is a fork of Workflow that is actively developed and accepts code contributions. |
 
 # Controller Go SDK
 [![Build Status](https://ci.deis.io/buildStatus/icon?job=Deis/controller-sdk-go/master)](https://ci.deis.io/job/Deis/job/controller-sdk-go/job/master/)