Update header.css wtih fix from: https://github.com/jothepro/doxygen-awesome-css/issues/88#issuecomment-1264623634

git subrepo clone --branch=v2.1.0 --force https://github.com/jothepro/doxygen-awesome-css.git doc/doxygen-awesome-css

subrepo:
  subdir:   "doc/doxygen-awesome-css"
  merged:   "a3c119b"
upstream:
  origin:   "https://github.com/jothepro/doxygen-awesome-css.git"
  branch:   "v2.1.0"
  commit:   "a3c119b"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "2f68596"

subrepo:
  subdir:   "cmake"
  merged:   "cd0fbc5"
upstream:
  origin:   "https://git.ufz.de/chs/cmake-fortran-scripts.git"
  branch:   "v1.8"
  commit:   "cd0fbc5"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "2f68596"

git subrepo clone (merge) --branch=v1.7 --force https://git.ufz.de/chs/cmake-fortran-scripts.git cmake

subrepo:
  subdir:   "cmake"
  merged:   "b4ffa36"
upstream:
  origin:   "https://git.ufz.de/chs/cmake-fortran-scripts.git"
  branch:   "v1.7"
  commit:   "b4ffa36"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "2f68596"