gk-deploy: use "read -r" instead of plain "read"
gk-deploy: use "read -r" instead of plain "read"

suggested by ShellCheck

Signed-off-by: Michael Adam <dcf2bf3ff8ea93047d51252815aac9756207ea09@redhat.com>

gluster/gluster-kubernetes,gluster/gluster-kubernetes,ramkrsna/gluster-kubernetes,ramkrsna/gluster-kubernetes