c9s: Pull in latest bootc/ostree

[cgwalters]

On general principle, but specifically to enable transient root.

[cgwalters]

OK, whee. I had to do like 8 clicks through the rhtap logs to find the failing job run here, and all that gave me was a URL to a testing farm artifact 😢 But digging into that shows the failure is

TASK [assert] ******************************************************************
fatal: [guest]: FAILED! => changed=false 
  assertion: result_list_boots.stdout_lines | length > 1
  evaluated_to: false
  msg: NO journald persistent logging configured

which is a known unrelated regression, so I'm clicking merge.

[cgwalters]

Some stamp please

[cgwalters]

Integration test failures are tracked at #354 and are unrelated to this PR

[bcrochet]

/lgtm

[cgwalters]

cc @sallyom @rhatdan

[rhatdan]

LGTM