fix tmpfs mount definitions for latest molecule-plugins

Author: sjpb

molecule/test1/molecule.yml

@@ -9,8 +9,8 @@ platforms:
       - testohpc_login
     command: "/bin/bash -c 'dnf -y install systemd && /sbin/init'" # not in RL9 image
     tmpfs:
-      - /run
-      - /tmp
+      /run:
+      /tmp:
     volumes:
       - /sys/fs/cgroup:/sys/fs/cgroup:ro
     network: net1