[CI] use image with pandoc already installed

4 jobs for !28 with ci_use_image_with_pandoc in 2 minutes and 27 seconds (queued for 6 seconds)
latest detached
Status Name Job ID Coverage
  Style
passed black #242258

00:00:11

passed flake8 #242257

00:00:09

passed flake8_nb #242259

00:00:20

 
  Test
passed test-3.6 #242260

00:02:05

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