fix: correct repo link in project readme

The quoted URL for the mayastor control plane repository
has been updated so as to refer to its intended location
at the release of version 1.0.0

This is within the OpenEBS organisation, rather than
under MayaData-io as it originated

README.md

@@ -48,7 +48,7 @@ At a high-level, Mayastor consists of two major components.
 
  * A microservices patterned control plane, centered around a core agent which publically exposes a RESTful API.  This is extended by a dedicated operator responsible 
  for managing the life cycle of "Mayastor Pools" (an abstraction for devices supplying the cluster with persistent backing storage) and a CSI compliant external provisioner (controller).
- Source code for the control plane components is located in its [own repository](https://github.com/mayadata-io/mayastor-control-plane)
+ Source code for the control plane components is located in its [own repository](https://github.com/openebs/mayastor-control-plane)
 
  * A _per_ node instance *mayastor-csi* plugin which implements the identity and node grpc services from CSI protocol.