chore: security update

Author: posva

packages/router/SECURITY.md

@@ -7,9 +7,8 @@ currently being supported with security updates.
 
 | Version    | Supported          |
 | ---------- | ------------------ |
-| 4.0.x      | :white_check_mark: |
-| 3.5.x      | :white_check_mark: |
-| < 3.5.x | :x:                |
+| 4.x      | :white_check_mark: |
+| <3.x      | :x: |
 
 ## Reporting a Vulnerability