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>
14 jobs for master in 18 minutes and 58 seconds (queued for 5 seconds)
Child pipeline (parent) latest
Status Job ID Name Coverage
  Ubuntu Container Build
passed #8143865
ubuntu:18.04@container-build@x86_64

00:01:08

passed #8143855
aarch64
ubuntu:20.10@container-build@aarch64

00:01:13

passed #8143843
ubuntu:20.10@container-build@x86_64

00:01:07

passed #8143860
kvm
ubuntu:20.10@qemu-build@x86_64

00:17:12

passed #8143849
ubuntu@cache-container-build@x86_64

00:01:08

 
  Ubuntu Check
passed #8143892
check labels ubuntu@x86_64:20.10

00:00:12

passed #8143889
do not rebuild ubuntu:20.10@container-build@x86_64

00:00:18

passed #8143895
pull upstream ubuntu:20.10@container-build@x86_64

00:00:41

passed #8143897
ubuntu:18.04@check@x86_64

00:00:18

passed #8143874
ubuntu:20.10@base-image@x86_64

00:01:07

passed #8143881
aarch64
ubuntu:20.10@check@aarch64

00:00:14

passed #8143870
ubuntu:20.10@check@x86_64

00:00:13

passed #8143885
kvm
ubuntu:20.10@qemu-check@x86_64

00:01:45

passed #8143877
ubuntu@cache-check@x86_64

00:00:09