Add audit trail plan back to products.yml, add it to frontmatter

Author: forstisabella

src/_data/products.yml

@@ -154,3 +154,12 @@ items:
     team: true
     business: true
     add-on: false
+
+- product_display_name: Audit Trail
+  slug: audit-trail
+  plan-note: "Audit Trail is available as an add-on for customers with the Business plan."
+  plans:
+    free: false
+    team: false
+    business: true
+    add-on: true

src/segment-app/iam/audit-trail.md

@@ -1,7 +1,7 @@
 ---
 title: Audit Trail
+plan: audit-trail
 ---
-{% include content/plan-grid.md name="audit-trail" %}
 
 Segment offers an in-app 90 day Audit Trail for Business Tier accounts. If you are a Workspace Owner, you view user and system activity in your workspace settings, in the "Audit Trail" tab under "Admin".