Bump candlepin to 4.6 for nightly

Author: ogajduse

vagrant/config/versions.yaml

@@ -106,7 +106,7 @@ installers:
 
   - foreman: 'nightly'
     katello: 'nightly'
-    candlepin: '4.4'
+    candlepin: '4.6'
     pulpcore: 'nightly'
     puppet: 8
     boxes: