Replace custom_url -> preview_url

_includes/post-preview.html

@@ -10,10 +10,10 @@
 {% comment %}
   Assign header link url
   - default: link to the post's generated page
-  - custom: link to a custom location declared in `post.custom_url`
+  - custom: link to a custom location declared in `post.preview_url`
 {% endcomment %}
 {% assign post_url = site.baseurl | append: post.url %}
-{% assign preview_url = post.custom_url | default: post_url %}
+{% assign preview_url = post.preview_url | default: post_url %}
 
 <article id="{{ post_id }}" class="post-preview">
   <header class="post-preview__header">

_posts/2024-10-15-sunsetting-uswds-1-0.md

@@ -4,5 +4,5 @@ tags:
 - product update
 category: About
 excerpt: It's been over five years since we launched USWDS 2.0 and moved on from USWDS v1. We archived the USWDS v1 documentation site a few years back, and at the end of 2024 we'll be taking it offline. Content will likely still be available via archive.org.
-custom_url: https://v1.designsystem.digital.gov/
+preview_url: https://v1.designsystem.digital.gov/
 ---

_posts/2024-10-17-uswds-3.9.0.md

@@ -3,5 +3,5 @@ title: "Out now: USWDS 3.9.0"
 tags:
 - USWDS release
 category: About
-custom_url: https://github.com/uswds/uswds/releases/tag/v3.9.0
+preview_url: https://github.com/uswds/uswds/releases/tag/v3.9.0
 ---

_posts/2024-10-19-accessibility-inclusive-user-experiences copy.md

@@ -4,5 +4,5 @@ tags:
 - discussion
 category: About
 excerpt: This National Disability Employment Awareness Month, we’re talking about how members of the design community go beyond visual design to create more inclusive user experiences. What steps are you taking to ensure that your website design is accessible to all?
-custom_url: https://github.com/uswds/uswds/discussions/6109
+preview_url: https://github.com/uswds/uswds/discussions/6109
 ---