Merge branch 'issue/doc_build_params' into 'master'

Fix directories in Doxyfile

See merge request !217
4 jobs for master in 46 minutes and 17 seconds (queued for 6 seconds)
Status Job ID Name Coverage
  Test
passed #21264
dune-2.6

00:26:38

passed #21265
dune-2.7

00:37:00

passed #21266
dune-git

00:34:03

passed #21267
dune-git-full

00:46:17