fix: test sles sp update

Author: alessfg

molecule/default/molecule.yml

@@ -133,8 +133,7 @@ platforms:
       - /sys/fs/cgroup:/sys/fs/cgroup:rw
     command: /usr/sbin/init
   - name: sles-15
-    image: registry.suse.com/bci/bci-base:15.4
-    platform: x86_64
+    image: registry.suse.com/suse/sle15:15.6
     dockerfile: ../common/Dockerfile.j2
     privileged: true
     cgroupns_mode: host