integration-docs: Update IFTTT for new doc format.

Part of #29592.

zerver/webhooks/ifttt/doc.md

@@ -1,27 +1,41 @@
+# Zulip IFTTT integration
+
 IFTTT supports integrations with hundreds of
 [physical and digital products](https://ifttt.com/services), like
 dishwashers, cars, web services, and more. Get IFTTT notifications directly
 in Zulip.
 
+{start_tabs}
+
 1. {!create-channel.md!}
 
 1. {!create-an-incoming-webhook.md!}
 
-1. {!generate-integration-url.md!}
+1. {!generate-webhook-url-basic.md!}
 
-1. Create an [IFTTT account](https://ifttt.com/join). Select the service you'd like
+1. Create an [IFTTT account](https://ifttt.com/join). Select the service
-   to receive notifications from as `this`. Select **Webhooks** as
+   you'd like to receive notifications from as `this`. Select
-   `that`. Select the **Make a web request** action.
+   **Webhooks** as `that`. Select the **Make a web request** action.
 
-1. Set **URL** to the URL constructed above. Set **Method** to `POST`,
+1. Set **URL** to the URL generated above. Set **Method** to `POST`,
-   and set **Content Type** to `application/json`. Set **Body** to a
+   and set **Content Type** to `application/json`.
-   JSON object with two parameters: `content` and `topic`, like so:
+
+1. Set **Body** to a JSON object with two parameters: `content` and
+   `topic`, like so:
 
     `{"content": "message body", "topic": "message topic"}`
 
     You will most likely want to specify some IFTTT **Ingredients** to
     customize the topic and content of your messages. Click **Add ingredient**
     to see the available options and customize the `content` and `topic`
-    parameters as necessary. Click **Create action**, and click **Finish**.
+    parameters as necessary.
 
-**Congratulations! You're done!**
+1.  Click **Create action**, and click **Finish**.
+
+{end_tabs}
+
+Congratulations! You're done!
+
+### Related documentation
+
+{!webhooks-url-specification.md!}