frontend/app/install: remove typos in /install
frontend/app/install: remove typos in /install

Signed-off-by: Gyu-Ho Lee <3454051ee3341eb69bdf6fca40899cdad4d86496@gmail.com>

gyuho/etcdlabs,gyuho/etcdlabs,gyuho/etcdlabs,gyuho/etcdlabs,gyuho/etcdlabs