#3455: Update security policy for ESMValTool

SECURITY.md

@@ -2,20 +2,17 @@
 
 ## Supported Versions
 
-Use this section to tell people about which versions of your project are
-currently being supported with security updates.
+The following versions of ESMValTool are currently being supported with
+security updates.
 
-| Version | Supported          |
-| ------- | ------------------ |
-| 5.1.x   | :white_check_mark: |
-| 5.0.x   | :x:                |
-| 4.0.x   | :white_check_mark: |
-| < 4.0   | :x:                |
+| Version  | Supported          |
+| -------- | ------------------ |
+| 2.10.0   | :white_check_mark: |
+| < 2.10.0 | :x:                |
 
 ## Reporting a Vulnerability
 
-Use this section to tell people how to report a vulnerability.
+If you find a vulnerability, please contact the
+[ESMValTool Tech Lead Team][TLT].
 
-Tell them where to go, how often they can expect to get an update on a
-reported vulnerability, what to expect if the vulnerability is accepted or
-declined, etc.
+[TLT]: https://github.com/ESMValGroup/Community/tree/main/Tech%20Lead