Convert TOML front matter to YAML (#49690)

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

docs/sources/developers/http_api/alerting.md

@@ -1,9 +1,17 @@
-+++
-aliases = ["/docs/grafana/latest/developers/http_api/alerting/", "/docs/grafana/latest/http_api/alerting/"]
-description = "Grafana Alerts HTTP API"
-keywords = ["grafana", "http", "documentation", "api", "alerting", "alerts"]
-title = "Alerting HTTP API "
-+++
+---
+aliases:
+  - /docs/grafana/latest/developers/http_api/alerting/
+  - /docs/grafana/latest/http_api/alerting/
+description: Grafana Alerts HTTP API
+keywords:
+  - grafana
+  - http
+  - documentation
+  - api
+  - alerting
+  - alerts
+title: 'Alerting HTTP API '
+---
 
 # Alerting API