fix: security.md

Author: edisile

rockcraft.yaml

@@ -40,5 +40,5 @@ parts:
       # - flask/app/static # it already gets copied in the build-ui step
       - flask/app/deleted.yaml
       - flask/app/redirects.yaml
-      - flask/app/security.txt
+      - flask/app/security.md
       - flask/app/robots.txt

security.md

@@ -1,5 +1,5 @@
 Contact: mailto:security@ubuntu.com
-Expires: 2025-12-31T00:00:00.000Z
+Expires: 2026-12-31T00:00:00.000Z
 Preferred-Languages: en
 
 To report a security issue, please email [security@ubuntu.com](mailto:security@ubuntu.com) with a description of the issue, the steps you took to create the issue, affected versions, and, if known, mitigations for the issue.