Update comparison.mdx

Author: Siumauricio

apps/docs/content/docs/core/comparison.mdx

@@ -24,8 +24,9 @@ Comparison of the following deployment tools:
 | **Notifications**                       | ✅      | ❌                    | ❌                    | ✅      |
 | **Multi Server Support**                | ✅      | ❌                    | ❌                    | ✅      |
 | **Open Source Templates**               | ✅      | ✅                    | ❌                    | ✅      | 
+| **Shared Enviroment Variables**         | ✅      | ❌                    | ❌                    | ✅      | 
 | **Schedules Jobs**                      | ❌      | ❌                    | ❌                    | ✅      | 
 | **Cloudflare Tunnels**                  | ❌      | ❌                    | ❌                    | ✅      | 
-| **Preview Deployments**                 | ❌      | ❌                    | ❌                    | ✅      | 
+| **Preview Deployments**                 | ✅      | ❌                    | ❌                    | ✅      | 
 | **Teams**                               | ❌      | ❌                    | ❌                    | ✅      |
 | **Cloud/Paid Version**                  | ✅      | ✅                    | ✅                    | ✅      |