Docs: added bar gauge play link (grafana#86205)

* docs: added bar gauge play link

* Update docs/sources/panels-visualizations/visualizations/bar-gauge/index.md

Co-authored-by: Isabel Matwawana <76437239+imatwawana@users.noreply.github.com>

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Co-authored-by: Isabel Matwawana <76437239+imatwawana@users.noreply.github.com>

docs/sources/panels-visualizations/visualizations/bar-gauge/index.md

@@ -23,7 +23,9 @@ Bar gauges simplify your data by reducing every field to a single value. You cho
 
 This panel can show one or more bar gauges depending on how many series, rows, or columns your query returns.
 
-{{< figure src="/static/img/docs/v66/bar_gauge_cover.png" max-width="1025px" caption="Stat panel" >}}
+{{< figure src="/static/img/docs/v66/bar_gauge_cover.png" max-width="1025px" alt="Bar gauge panel" >}}
+
+{{< docs/play title="Bar Gauge" url="https://play.grafana.org/d/vmie2cmWz/" >}}
 
 ## Value options