docs(SECURITY): update supported version

Updated supported versions for security policy.

Author: char0n

SECURITY.md

@@ -8,7 +8,8 @@ If you believe you've found an exploitable security issue in @swaggerexpert/json
 |---------|--------------------|
 | ^1.0.0  | :x:                |
 | ^2.0.0  | :x:                |
-| ^3.0.0  | :white_check_mark: |
+| ^3.0.0  | :x:                |
+| ^4.0.0  | :white_check_mark: |
 
 ## Reporting a Vulnerability