scout: add grid tile for upgrading plans

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>

content/includes/scout-plans.md

@@ -1,3 +0,0 @@
-> **Info**
->
-> The Docker Scout free plan gives you unlimited local image analysis and up to 3 remote repositories. [If you need more, upgrade your plan](/billing/scout-billing/).

content/scout/_index.md

@@ -40,6 +40,11 @@ grid:
     description: |
       Ensure that your artifacts align with supply chain best practices.
     icon: policy
+  - title: Upgrade
+    link: /billing/scout-billing/
+    description: |
+      The free plan includes up to 3 repositories. Upgrade for more.
+    icon: upgrade
 ---
 
 Container images are often built from layers of other container images and
@@ -57,6 +62,4 @@ the [Docker Scout Dashboard](./dashboard.md). Docker Scout also supports
 integrations with third-party systems, refer to [Integrating Docker
 Scout](./integrations/index.md) for more information.
 
-{{< include "scout-plans.md" >}}
-
 {{< grid >}}