Merge pull request #359 from dajiaji/update-security-md

Update SECURITY.md.

Author: dajiaji

SECURITY.md

@@ -4,8 +4,8 @@
 
 | Version | Supported          |
 | ------- | ------------------ |
-| 2.2.x   | :white_check_mark: |
-| < 2.2   | :x:                |
+| 2.3.x   | :white_check_mark: |
+| < 2.3   | :x:                |
 
 ## Reporting a Vulnerability