Alerting docs: fix duplicate titles (#73680)

* Alerting docs: fix duplicate titles

* makes titles match

docs/sources/alerting/fundamentals/data-source-alerting.md

@@ -6,11 +6,11 @@ labels:
     - cloud
     - enterprise
     - oss
-title: Data sources
+title: Data sources for Alerting
 weight: 100
 ---
 
-# Data sources
+# Data sources for Alerting
 
 There are a number of data sources that are compatible with Grafana Alerting. Each data source is supported by a plugin. You can use one of the built-in data sources listed below, use [external data source plugins](/grafana/plugins/?type=datasource), or create your own data source plugin.
 

docs/sources/alerting/set-up/migrating-alerts/legacy-alerting/grafana-cloud-alerting/alertmanager.md

@@ -4,17 +4,17 @@ aliases:
   - /docs/grafana-cloud/how-do-i/grafana-cloud-alerting/alertmanager/
   - /docs/grafana-cloud/legacy-alerting/grafana-cloud-alerting/alertmanager/
 canonical: https://grafana.com/docs/grafana/latest/alerting/set-up/migrating-alerts/legacy-alerting/grafana-cloud-alerting/alertmanager/
-description: Alertmanager
+description: Alertmanager (legacy)
 labels:
   products:
     - cloud
     - enterprise
     - oss
-title: Alertmanager
+title: Alertmanager (legacy)
 weight: 500
 ---
 
-# Alertmanager
+# Alertmanager (legacy)
 
 Grafana Cloud Alerting allows you to edit and view configuration for your Alertmanager directly inside of Grafana. See the official [Alertmanager documentation](https://prometheus.io/docs/alerting/latest/configuration/) to learn how to configure.