(DOCSP-23652) Charts refresh rate clarification (#544)

* (DOCSP-23652) Charts refresh rate clarification

* reformat

* copy review

Author: zach-carr

source/dashboard-refresh.txt

@@ -35,9 +35,12 @@ To configure auto-refresh settings for a dashboard:
 
 #. Click :guilabel:`Auto Refresh Settings` from the dropdown.
 
-#. Select your data staleness tolerance from the dropdown.
-   |charts-short| supports staleness tolerances between 1 minute and 30
-   days.
+#. Select your data staleness tolerance from the dropdown. 
+   |charts-short| supports the following staleness tolerances:
+   
+   - An increment of time between 1 minute and 30 days, or
+   - Infinity. If you select infinity, your chart doesn't automatically 
+     refresh.
 
 #. Click :guilabel:`Save`.