docs(wordpress): fix broken assets link after migration (#29389)

Author: meeroslav

packages/gatsby-source-wordpress/docs/tutorials/configuring-wp-gatsby.md

@@ -13,15 +13,15 @@ Navigate to your GatsbyJS WordPress settings by visiting this path in your WP in
 
 You should see the following "Builds Webhook" field at the top of the page:
 
-![WPGatsby Builds Webhook Screenshot](/docs/assets/wp-gatsby-builds-webhook-settings.png)
+![WPGatsby Builds Webhook Screenshot](../../docs/assets/wp-gatsby-builds-webhook-settings.png)
 
 Enter the Webhook that should be used, a POST request will be sent to the Webhook when content is updated in WordPress.
 
 If you're using [Gatsby Cloud](https://www.gatsbyjs.com/dashboard/sites), you can find this webhook by navigating to the "Site Settings" tab for your Gatsby instance and then navigating to "Webhook" in the left-side menu.
 
 Below your "Preview Webhook" you should see your "Builds Webhook". Copy this webhook and enter it into your WordPress settings.
 
-![Gatsby Cloud Builds Webhook Screenshot](/docs/assets/gatsby-cloud-builds-webhook.png)
+![Gatsby Cloud Builds Webhook Screenshot](../../docs/assets/gatsby-cloud-builds-webhook.png)
 
 Now that your Builds webhook is set up, when content is updated in WordPress your content will update in 4 to 12 seconds if you're using Gatsby Cloud with Incremental Builds, and in 45 seconds to a few minutes (and beyond) if you're using other services! :rocket:
 
@@ -41,7 +41,7 @@ You will see 4 fields related to Gatsby Preview. "Enable Gatsby Preview?", "Prev
 
 If you don't see this settings page, or you don't see these 4 fields, make sure the latest version of [WPGatsby](https://github.com/gatsbyjs/wp-gatsby) is installed in your WordPress instance.
 
-![wp-gatsbyjs-preview-settings](/docs/assets/wp-gatsbyjs-preview-settings.png)
+![wp-gatsbyjs-preview-settings](../../docs/assets/wp-gatsbyjs-preview-settings.png)
 
 #### 1. Check the "Enable Gatsby Preview?" Checkbox
 
@@ -53,13 +53,13 @@ This field should be filled with the public frontend URL of your Gatsby Preview
 
 To find your **Preview Instance URL**, navigate to the "Preview" tab in [Gatsby Cloud](https://www.gatsbyjs.com/dashboard/sites), wait for your first Preview build to complete, and then copy the frontend URL from above the build history list in the center of the page.
 
-![Gatsby Cloud Preview frontend URL Screenshot](/docs/assets/gatsby-cloud-preview-frontend-url.png)
+![Gatsby Cloud Preview frontend URL Screenshot](../../docs/assets/gatsby-cloud-preview-frontend-url.png)
 
 #### 3. Fill the "Preview Webhook" Field
 
 You can find your **Preview webhook** by navigating to "Site Settings" in Gatsby Cloud and then navigating to "Webhooks" via the left-side menu.
 
-![Gatsby Cloud Preview Webhook URL](/docs/assets/gatsby-cloud-preview-webhook-url.png)
+![Gatsby Cloud Preview Webhook URL](../../docs/assets/gatsby-cloud-preview-webhook-url.png)
 
 #### 4. Double check the "Preview JWT secret" field