Fix default_config example in pillar.example

pillar.example

@@ -4,11 +4,11 @@ logrotate:
     pkg: logrotate
     service: crond
   default_config:
-    - weekly
-    - rotate: 52
-    - create
-    - compress
-    - dateext
+    weekly: True
+    rotate: 52
+    create: True
+    compress: True
+    dateext: True
   jobs:
       /tmp/var/log/mysql/error:
       config: