Update twitter account (#1003)

Signed-off-by: Tamal Saha <[email protected]>

README.md

@@ -3,7 +3,7 @@
 [![codecov](https://codecov.io/gh/stashed/stash/branch/master/graph/badge.svg)](https://codecov.io/gh/stashed/stash)
 [![Docker Pulls](https://img.shields.io/docker/pulls/appscode/stash.svg)](https://hub.docker.com/r/appscode/stash/)
 [![Slack](https://slack.appscode.com/badge.svg)](https://slack.appscode.com)
-[![Twitter](https://img.shields.io/twitter/follow/appscodehq.svg?style=social&logo=twitter&label=Follow)](https://twitter.com/intent/follow?screen_name=AppsCodeHQ)
+[![Twitter](https://img.shields.io/twitter/follow/kubestash.svg?style=social&logo=twitter&label=Follow)](https://twitter.com/intent/follow?screen_name=KubeStash)
 
 # Stash
  Stash by AppsCode is a Kubernetes operator for [restic](https://restic.net). If you are running production workloads in Kubernetes, you might want to take backup of your disks. Traditional tools are too complex to setup and maintain in a dynamic compute environment like Kubernetes. `restic` is a backup program that is fast, efficient and secure with few moving parts. Stash is a CRD controller for Kubernetes built around `restic` to address these issues. Using Stash, you can backup Kubernetes volumes mounted in following types of workloads: