fix: try diff body

Author: henrywhitaker3

argo/cluster/monitoring/kube-prometheus-stack/chart/values.yaml

@@ -27,7 +27,7 @@ alertmanager:
           - url_file: /etc/alertmanager/secrets/alertmanager-secrets/heartbeat
       - name: discord_warn
         discord_configs:
-          - webhook_url_file: /etc/alertmanager/secrets/alertmanager-secrets/discord_warn
+          - api_url_file: /etc/alertmanager/secrets/alertmanager-secrets/discord_warn
             send_resolved: true
       - name: discord
         slack_configs: