ci: always build documentation

To ensure it works.
6 jobs for <span class="ref-name">docker-improvements</span> in 12 minutes and 48 seconds (queued for 4 minutes and 17 seconds)
Status Job ID Name Coverage
  Precheck
passed #30347
triggered
check_component

00:00:38

 
  Build
passed #30350
triggered
build_doc

00:01:14

passed #30349
triggered
build_driver

00:00:37

passed #30348
triggered
build_ip_and_tests

00:01:26

passed #30351
triggered
build_linux_driver

00:00:38

 
  Test
passed #30352
triggered
test_ip_fast

00:08:13

95.6%