Update SECURITY.md

Author: matthewdowns

.github/SECURITY.md

@@ -7,7 +7,8 @@ currently being supported with security updates.
 
 | Version | Supported          |
 | ------- | ------------------ |
-| 1.1.x   | :white_check_mark: |
+| 1.2.x   | :white_check_mark: |
+| 1.1.x   | :x:                |
 | 1.0.x   | :x:                |
 | < 1.0   | :x:                |