update wording as suggested and version to latest release

SECURITY.md

@@ -4,12 +4,12 @@
 
 | Version | Supported          |
 | ------- | ------------------ |
-| 1.2.1   | :white_check_mark: |
-| < 1.2.1 | :x:                |
+| 1.3     | :white_check_mark: |
+| < 1.3   | :x:                |
 
 ## Reporting a Vulnerability
 
-We run a mailing list under security@privatebin.org. You should be able to get
+You can send us email at security@privatebin.org. You should be able to get
 a response within a week (usually during the next weekend). The respondee will
 reply from their personal address and can offer you their GPG public key to
 support end-to-end encrypted communication on sensitive topics or attachments.