Update edgefs-quickstart.md
Update edgefs-quickstart.md

Correct the namespace of rook cluster. It should be `rook-edgefs`

Signed-off-by: Khanh Ngo <13fbd79c3d390e5d6585a21e11ff5ec1970cff0c@ndk.name>

rook/rook,rook/nfs,rook/rook,rook/rook,rook/rook,rook/nfs,rook/rook,rook/nfs