upd Security.md

SECURITY.md

@@ -2,9 +2,7 @@
 
 ## Supported Versions
 
-Supported Versions:
-
-Currently, we support security patches by committing changes and bumping the version published on Github.
+Security patches target the latest release and the `main` branch. We recommend always running the most recent version.
 
 ## Reporting a Vulnerability
 
@@ -14,7 +12,11 @@ https://github.com/arc53/DocsGPT/security
 Then click **Report a vulnerability**.
 
 
-Alternatively:
+Alternatively, email us at: security@arc53.com
 
-security@arc53.com
+We aim to acknowledge reports within 48 hours.
+
+## Incident Handling
+
+Arc53 maintains internal incident response procedures. If you believe an active exploit is occurring, include **URGENT** in your report subject line.