Change installation source for OpenBSD tests

Signed-off-by: Martin Schurz <[email protected]>

.github/workflows/ssh_hardening_bsd.yml

@@ -36,7 +36,7 @@ jobs:
       fail-fast: false
       matrix:
         molecule_distro:
-          # - openbsd7 # disabled because of outdated image, see https://github.com/lavabit/robox/issues/305
+          - openbsd7
           - freebsd13
           - freebsd14
     steps: