Update supported version info in SECURITY.md

Corrected the version table to indicate that only versions 1.4.x and above are supported for security updates, clarifying that versions below 1.4 are not supported.

Author: jferrl

SECURITY.md

@@ -7,7 +7,7 @@ We actively maintain and provide security updates for the following versions of
 | Version | Supported          |
 | ------- | ------------------ |
 | 1.4.x   | :white_check_mark: |
-| < 1.3   | :x:                |
+| < 1.4   | :x:                |
 
 Please ensure you are using a supported version to receive security updates.