chore: revise SECURITY.md

Co-Authored-By: Emanuele <my.burning@gmail.com>

Author: evenstensberg

SECURITY.md

@@ -9,7 +9,7 @@ webpack CLI is currently supporting webpack v4 and webpack v5. Security fixes ar
 | webpack version | webpack-cli version           | Supported          |
 | --------------- | ----------------------------- | ------------------ |
 | >= 4.20.x        | ^3.1.2                        | :white_check_mark: |
-| 4.20.x          | ^3.1.2                        | :white_check_mark: |
+| <= 4.19.x          | ^3.1.1                        | :white_check_mark: |
 | 5.x.0           | ^3.1.2                        | :white_check_mark: |
 | 5.0.x           | ^3.1.2                        | :white_check_mark: |
 | < 4.x.x         | (CLI included in webpack < 4) | :x:                |