[tahoe-lafs-trac-stream] [Tahoe-LAFS] #4143: Refresh docker builder images

[Tahoe-LAFS]

#4143: Refresh docker builder images
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     Reporter:  btlogy              |      Owner:  btlogy
         Type:  task                |     Status:  new
     Priority:  normal              |  Milestone:  undecided
    Component:  dev-infrastructure  |    Version:  n/a
   Resolution:                      |   Keywords:
Launchpad Bug:                      |
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Comment (by meejah):

 Job was rejected because this version of Docker is not supported on this
 resource class. Try removing the version of Docker in your
 .circleci/config.yml and re-running

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/4143#comment:4>
Tahoe-LAFS <https://Tahoe-LAFS.org>
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