Hide alert update success toast

public/app/features/alerting/unified/api/alertRuleApi.ts

@@ -272,6 +272,7 @@ export const alertRuleApi = alertingApi.injectEndpoints({
         url: `/api/ruler/grafana/api/v1/rules/${nameSpaceUID}/`,
         data: payload,
         method: 'POST',
+        showSuccessAlert: false,
       }),
       invalidatesTags: ['AlertRulerRule'],
     }),