Provide an example for timepicker:refreshIntervalDefaults (#47345)

* Provide an example for timepicker:refreshIntervalDefaults

Add an example for `timepicker:refreshIntervalDefaults`

* align with master

Author: lucabelluccini

docs/management/advanced-options.asciidoc

@@ -94,7 +94,7 @@ refresh the page to apply the setting.
 the time filter. This should be an array of objects, with each object containing 
 `from`, `to` (see {ref}/common-options.html#date-math[accepted formats]), 
 and `display` (the title to be displayed).
-`timepicker:refreshIntervalDefaults`:: The default refresh interval for the time filter.
+`timepicker:refreshIntervalDefaults`:: The default refresh interval for the time filter. Example: `{ "display": "15 seconds", "pause": true, "value": 15000 }`.
 `timepicker:timeDefaults`:: The default selection in the time filter.
 `truncate:maxHeight`:: The maximum height that a cell occupies in a table. Set to 0 to disable
 truncation.
@@ -268,6 +268,3 @@ If disabled, only visualizations that are considered production-ready are availa
 Helps improve the Elastic Stack by providing usage statistics for 
 basic features. This data will not be shared outside of Elastic.
 
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