improved the doxygen CI

1 job for master in 11 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #1112022
docker
pages

00:00:11

 
Name Stage Failure
failed
pages Test
fetch https://dl-cdn.alpinelinux.org/alpine/v3.13/main/x86_64/APKINDEX.tar.gz
fetch https://dl-cdn.alpinelinux.org/alpine/v3.13/community/x86_64/APKINDEX.tar.gz
v3.13.5-194-g1274644b64 [https://dl-cdn.alpinelinux.org/alpine/v3.13/main]
v3.13.5-187-g1477654ee3 [https://dl-cdn.alpinelinux.org/alpine/v3.13/community]
OK: 13890 distinct packages available
epstopdf (no such package):
ERROR: unable to select packages:
required by: world[epstopdf]
ERROR: Job failed: exit code 1