Update router.config.yaml configuration example

Author: dotansimha

packages/documentation/content/docs/schema-registry/get-started/apollo-federation.mdx

@@ -657,7 +657,7 @@ To start, create a configuration file `router.config.yaml` with the following co
 
 ```yaml title="router.config.yaml"
 supergraph:
-  type: hive
+  source: hive
   endpoint: "<hive_cdn_endpoint>"
   key: "<hive_cdn_access_key>"
 ```