message: Update README with new copy
diff: @@ -24,3 +24,7 @@ can be organised around the entities in the catalog.
  TODO
  ![](service-catalog-home.png)
  +
  +## Links
  +
  +- [[Blog post] Backstage Service Catalog released in alpha](https://backstage.io/blog/2020/06/22/backstage-service-catalog-alpha)
  