Update scylla-ami submodule
Update scylla-ami submodule

* dist/ami/files/scylla-ami 025644d...1f5329f (1):
  > scylla_install_ami: Update CentOS to latest version

duarten/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla,avikivity/scylla,duarten/scylla,avikivity/scylla,scylladb/scylla,duarten/scylla