doc: ci-fairy: fix build doc complain

doc/ci-fairy.rst:387: WARNING: Error in "code-block" directive:
maximum 1 argument(s) allowed, 36 supplied.

This resulted in the following block code to not be shown in the
generated output file.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
2 jobs for master in 1 minute and 33 seconds (queued for 1 second)
Child pipeline (parent) latest
Status Job ID Name Coverage
  Base Image Build
passed #8144794
ci-fairy-base-image

00:00:12

 
  Image Build
passed #8144795
ci-fairy-image

00:01:21