Fixed incorrect link to text panel page (#43757)

"Text panel" was linking to the "alert list panel" page: (https://grafana.com/docs/grafana/latest/visualizations/alert-list-panel/). This change should map it to the correct page now (https://grafana.com/docs/grafana/latest/visualizations/text-panel/).

Co-authored-by: achatterjee-grafana <aparajita.chatterjee@grafana.com>

docs/sources/visualizations/_index.md

@@ -30,7 +30,7 @@ Grafana offers a variety of visualizations to support different use cases. This
 - Widgets
   - [Dashboard list]({{< relref "./dashboard-list-panel.md" >}}) can list dashboards.
   - [Alert list]({{< relref "./alert-list-panel.md" >}}) can list alerts.
-  - [Text panel]({{< relref "./alert-list-panel.md" >}}) can show markdown and html.
+  - [Text panel]({{< relref "./text-panel.md" >}}) can show markdown and html.
   - [News panel]({{< relref "./news-panel.md" >}}) can show RSS feeds.
 
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