Use Candlepin 4.7 in nightly

Author: ehelms

vagrant/config/versions.yaml

@@ -128,7 +128,7 @@ installers:
 
   - foreman: 'nightly'
     katello: 'nightly'
-    candlepin: '4.6'
+    candlepin: '4.7'
     pulpcore: 'nightly'
     puppet: 8
     boxes: