[pfsense_aggregate] Add default doc for ignored_aliases/rules

Author: opoplawski

plugins/modules/pfsense_aggregate.py

@@ -536,11 +536,13 @@
   ignored_aliases:
     description: aliases that will be ignored (won't be auto deleted)
     required: False
+    default: []
     type: list
     elements: str
   ignored_rules:
     description: rules that will be ignored (won't be auto deleted)
     required: False
+    default: []
     type: list
     elements: str
 """