First, you should ensure that the /etc/apt/sources.list is correctly populated for updating Kali.
kali@kali:~$ cat /etc/apt/sources.list
# See https://www.kali.org/docs/general-use/kali-linux-sources-list-repositories/
deb http://http.kali.org/kali kali-rolling main contrib non-free# Additional line for source packages
# deb-src http://http.kali.org/kali kali-rolling main contrib non-free
kali@kali:~$
For upgrading to the latest version of Kali, run the following command:
kali@kali:~$ sudo apt update
kali@kali:~$
kali@kali:~$ sudo apt full-upgrade -y
kali@kali:~$
