Fix wording around Flexible Topologies development state

CHANGELOG.md

@@ -10,7 +10,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Traffic Ops API v3
 - Added an optional readiness check service to cdn-in-a-box that exits successfully when it is able to get a `200 OK` from all delivery services
 - Added health checks to Traffic Ops and Traffic Monitor in cdn-in-a-box
-- [Flexible Topologies (in progress)](https://github.com/apache/trafficcontrol/blob/master/blueprints/flexible-topologies.md)
+- [Flexible Topologies](https://github.com/apache/trafficcontrol/blob/master/blueprints/flexible-topologies.md)
     - Traffic Ops: Added an API 3.0 endpoint, `GET /api/3.0/topologies`, to create, read, update and delete flexible topologies.
     - Traffic Ops: Added an API 3.0 endpoint, `POST /api/3.0/topologies/{name}/queue_update`, to queue or dequeue updates for all servers assigned to the Cachegroups in a given Topology.
     - Traffic Ops: Added new `topology` field to the /api/3.0/deliveryservices APIs