added a small comment for the refresh option on filters

dashboards/variables.py

@@ -3,6 +3,10 @@ from collections import namedtuple
 from dashboards.influx_queries import show_tag_values, get_tag_values, show_field_keys
 from typing import List
 
+"""
+multi: maps to the multi_value option
+refresh: maps to the grafanalib.Template refresh 1= on dashboard load 2= on timer range change
+"""
 Filter = namedtuple(
     "Filter", ("name", "multi", "default_value", "refresh"), defaults=("", True, "", 1)
 )