chore(zenduty): add syntax highlighting for JSON payload
@@ -24,8 +24,8 @@ In [Zenduty][1], follow the steps below:
5. From the sidebar, go to **Integrations**. Search for **Webhooks** from [this page][2], and click the add button.
-6. Scroll down, click on the **+New** button in the Webhooks section. Fill in the name, the webhook URL copied from Zenduty, and paste the following JSON in the payload box:
-```
+6. Scroll down, click on the <kbd>**+New**</kbd> button in the Webhooks section. Fill in the name, the webhook URL copied from Zenduty, and paste the following JSON in the payload box:
+```json
{
"alert_id": "$ALERT_ID",
"hostname": "$HOSTNAME",
