Docs: Fix incorrect label in recording rules documentation (#111464)

* Fix incorrect label: 'New Grafana recording rule' → 'New Data source recording rule'

* lowercase

docs/sources/alerting/alerting-rules/create-recording-rules/create-data-source-managed-recording-rules.md

@@ -47,7 +47,7 @@ Note that in data source-managed groups, the alert rules and recording rules wit
 To create a new data source-managed recording rule:
 
 1. Click **Alerts & IRM** -> **Alerting** -> **Alert rules**.
-1. At the top of the Alert rules page, click **More** -> **New Grafana recording rule**.
+1. At the top of the Alert rules page, click **More** -> **New Data source recording rule**.
 
 ## Enter recording rule name