Typo in install command

cmake -S <path_to_source> -B <path_to_build_area>  -DDD4hep_DIR=<path_to_DD4hp> cmake -DGeant4_DIR=<path_to_Geant4> -DROOT_DIR=<path_to_ROOT> -DCMAKE_CXX_STANDARD=17

should be

cmake -S <path_to_source> -B <path_to_build_area>  -DDD4hep_DIR=<path_to_DD4hp> -DGeant4_DIR=<path_to_Geant4> -DROOT_DIR=<path_to_ROOT> -DCMAKE_CXX_STANDARD=17

(i.e. remove duplicated cmake command)