integration-docs: Update WordPress for new doc format.

Part of zulip#29592.

Co-authored-by: Lauryn Menard <lauryn@zulip.com>

zerver/webhooks/wordpress/doc.md

@@ -1,33 +1,37 @@
+# Zulip WordPress integration
+
 Get WordPress notifications in Zulip!
 
-If you're hosting your WordPress blog yourself (i.e., not on WordPress.com),
-first install the
-[HookPress plugin](https://wordpress.org/plugins/hookpress/) (experimental).
+{start_tabs}
 
 1. {!create-channel.md!}
 
 1. {!create-an-incoming-webhook.md!}
 
-1. {!generate-integration-url.md!}
+1. {!generate-webhook-url-basic.md!}
 
-    **Important:** The HookPress plugin requires URL parameters to
-    be delimited by semicolons instead of ampersands. If you have a
-    self-hosted blog, replace every `&` with `;` in the URL above.
+1. Add `/wp-admin/options-general.php?page=webhooks` to the end of your
+   WordPress URL, and navigate to the site. Click **Add webhook**.
 
-1. Go to
-   `https://YOUR-WORDPRESS-BLOG/wp-admin/options-general.php?page=webhooks`,
-   after replacing `YOUR-WORDPRESS-BLOG` appropriately. Click **Add webhook**.
+1. Select an **Action** from the [supported
+   events](#filtering-incoming-events) that you'd like to be notified
+   about, along with these corresponding **Fields**: `post_title`,
+   `post_type`, and `post_url`.
 
-1. Select the **Action** that you'd like to be notified about, along with
-   the corresponding **Fields**. The list of currently supported actions is:
+1. Set **URL** to the URL generated above, and click **Add new webhook**.
 
-    * **publish_post**: Use fields *post_title*, *post_type*, and *post_url*
-    * **publish_page**: Use fields *post_title*, *post_type*, and *post_url*
-    * **user_register**: Use fields *display_name* and *user_email* (available on self-hosted blogs only)
-    * **wp_login**: Use field *user_login* (available on self-hosted blogs only)
-
-1. Set **URL** to the URL constructed above, and click **Add new webhook**.
+{end_tabs}
 
 {!congrats.md!}
 
 ![](/static/images/integrations/wordpress/wordpress_post_created.png)
+
+{!event-filtering-additional-feature.md!}
+
+### Related documentation
+
+- [WordPress webhooks documentation][1]
+
+{!webhooks-url-specification.md!}
+
+[1]: https://wordpress.com/support/webhooks/