how to rename crypted device in crypttab

according to n.r.,

"""
Replace OLD_NAME with NEW_NAME in /etc/crypttab, and then:

# dmsetup rename OLD_NAME NEW_NAME
# update-initramfs -c -t -k all
# update-grub
# reboot
"""

references:

- https://unix.stackexchange.com/questions/81011/how-to-change-the-name-an-encrypted-full-system-partition-is-mapped-to