Docs: fix of broken doc link in the dashlist panel's help section (#21230)

* fixed the broker link of dashlist panel docs

* fixed broken document link

public/app/plugins/panel/dashlist/README.md

@@ -6,4 +6,4 @@ The dashboard list panel allows you to display dynamic links to other dashboards
 
 Read more about it here:
 
-[http://docs.grafana.org/reference/dashlist/](http://docs.grafana.org/reference/dashlist/)
\ No newline at end of file
+[https://grafana.com/docs/grafana/latest/features/panels/dashlist/](https://grafana.com/docs/grafana/latest/features/panels/dashlist/)