Merge pull request #7601 from ThomasWaldmann/security-support-docs-master

Security support docs (master)

SECURITY.md

@@ -6,8 +6,9 @@ These borg releases are currently supported with security updates.
 
 | Version | Supported          |
 |---------|--------------------|
+| 2.0.x   | :x: (not released) |
 | 1.2.x   | :white_check_mark: |
-| 1.1.x   | :white_check_mark: |
+| 1.1.x   | :x:                |
 | < 1.1   | :x:                |
 
 ## Reporting a Vulnerability